What are transition elements? (1) Elements whose two outermost shells are incomplete (2) Elements which possess properties of both, metals and non-metals (3) They have eight electrons in the outermost shell (4) Elements whose three outermost shells are incomplete

What are transition elements? (1) Elements whose two outermost shells are incomplete (2) Elements which possess properties of both, metals and non-metals (3) They have eight electrons in the outermost shell (4) Elements whose three outermost shells are incomplete
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(1) Elements whose two outermost shells are incomplete
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Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B Elements of Group 16 occur as cations in ionic compounds. C Oxides of elements in Groups 16 and 17 are basic. D The halogens (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Description : Which one of the following statements concerning elements in the Periodic Table is correct? A Elements of the same group all have the same number of electrons in the outermost occupied electron shell. B ... (Group 17) are all gases at room temperature. E The Group 13 elements are all metals.

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Elements with eight electrons in their outermost shell are called

Description : Elements with eight electrons in their outermost shell are called

Last Answer : noble gases

A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Description : A characteristic of the noble gases is that they all: w) have eight electrons in the outer shell x) have low stability y) form many compounds z) have filled outer electron shells

Last Answer : ANSWER: Z -- HAVE FILLED OUTER ELECTRON SHELLS

Elements which are not distinctively metals and possess some physical properties of non- metals are called

Description : Elements which are not distinctively metals and possess some physical properties of non- metals are called

Last Answer : metalloids.

Which one of the following best defines the word “allotropes”? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between those of metals and nonmetals D Atoms of a given atomic number that have a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Description : Which one of the following best defines the word allotropes ? A Different structural forms of an element B A pair of substances that differ by H+ C Elements that possess properties intermediate between ... a specific number of neutrons E The different phases (solid, liquid or gas) of a substance

Last Answer : A Different structural forms of an element 

Why are electrons in the outermost shell are important?

Description : Why are electrons in the outermost shell are important?

Last Answer : Because they determine how the element will combine with otherelements

In general the number of electrons in the outermost shell of the metal is A)1B)1 to 3 C)5 to 8 D)8

Description : In general the number of electrons in the outermost shell of the metal is A)1B)1 to 3 C)5 to 8 D)8

Last Answer : B)1 to 3

(1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one being bodycentered cubic wherein each metal atom is surrounded by eight equivalent atoms. The other main motif is face-centered cubic where the metal atoms are surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.

Description : (1) they contain free electrons Explanation: Metals typically consist of closepacked atoms, meaning that the atoms are arranged like closely packed spheres. Two packing motifs are common, one ... surrounded by six neighboring atoms. Several metals adopt both structures, depending on the temperature.

Last Answer : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas

The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER

Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electronegativity (3) Low ionization energy (4) Malleability

Description : Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electronegativity (3) Low ionization energy (4) Malleability

Last Answer : (1) Tendency to gain electrons Explanation: The transition metals have a tendency to lose electrons. Since the electrons in the highest energy level are actually on a lower principal enemy number than the ... ions, the 4s electrons are always lost first; so, they form only cations (positive ions).

Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electronegativity (3) Low ionization energy (4) Malleability

Description : Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electronegativity (3) Low ionization energy (4) Malleability 

Last Answer : Tendency to gain electrons

The periodic table arranges elements by the number of ____ in their outermost energy levels. a. neutrons c. protons b. atoms d. electrons

Description : The periodic table arranges elements by the number of ____ in their outermost energy levels. a. neutrons c. protons b. atoms d. electrons

Last Answer : d. electrons

By the transition of inner shell electrons in heavy atoms, high energy photons are emitted which are a) gamma rays b) X-rays c) radio waves d) photon rays

Description : By the transition of inner shell electrons in heavy atoms, high energy photons are emitted which are a) gamma rays b) X-rays c) radio waves d) photon rays

Last Answer : b) X-rays

Elements in which electrons of their atoms occupy ultimate shells leaving penultimate shells partially vacant are called

Description : Elements in which electrons of their atoms occupy ultimate shells leaving penultimate shells partially vacant are called

Last Answer : transition elements.

The elements with filled electron shells are called _______ a. Inert Elements. b. Active Elements. c. Radioactive Elements. d. Bonded Electrons.

Description : The elements with filled electron shells are called _______ a. Inert Elements. b. Active Elements. c. Radioactive Elements. d. Bonded Electrons.

Last Answer : d. Bonded Electrons.

Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Description : Metals, in general are of low strength and do not possess required physio-chemical and technological properties for a definite purpose. Alloys are therefore more than metals alone. Discuss the arrangement of atoms and Structures of alloys.

Last Answer : Alloys are produced by melting or sintering two ore more metals, or metals and a non-metal, together. Alloys possess typical properties inherent in the metallic state. The chemical elements ... an alloy are its individual portions, each having a single structure with its characteristic features.

(3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of the atom, the electron configuration determines how it will bond, with what it will bond, and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Description : (3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of ... , and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.

Last Answer : Methyl phenyl ether can be obtained by reacting - (1) phenolate ions and methyl iodide (2) methoxide ions and bromobenzene (3) methanol and phenol (4) bromobenzene and methyl bromide

Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The π-complexes are known for transition elements only. (iii) CO is a stronger ligand than NTL, for many metals. -Chemistry

Description : Explain the following : (i) Low spin octahedral complexes of nickel are not known. (ii) The π-complexes are known for transition elements only. (iii) CO is a stronger ligand than NTL, for many metals. -Chemistry

Last Answer : (i) The electronic configuration of Ni is [Ar] 3d8 4s2 which shows that it can only form two types of complexes i.e. square planar (dsp2) in presence of strong ligand and tetrahedral (sp3) in ... more splitting of d-orbitals and moreover it is also able to form π bond due to back bonding.

Why do transition metals have higher I.E than s –block elements ?

Description : Why do transition metals have higher I.E than s –block elements ?

Last Answer : Ans: It is due to smaller atomic size than s-block elements , effective nuclear charge is more , terefore I.E is high.

The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases

Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases

Last Answer : ANSWER: Y -- ALKALINE EARTHS

which of the following gas does not have an octet or eight electrons in the outer shell?

Description : which of the following gas does not have an octet or eight electrons in the outer shell?

Last Answer : which of the following gas does not have an octet or eight electrons in the outer shell? A. Neon B. Radon C. Argon D. Helium

Elements that show the properties of both metals and non-metals are called (a) Allotropes (b) Metalloids (c) Alloys (d) Colloids

Description : Elements that show the properties of both metals and non-metals are called (a) Allotropes (b) Metalloids (c) Alloys (d) Colloids

Last Answer : Ans:(b)

Elements showing properties of both met- als and non-metals are?

Description : Elements showing properties of both met- als and non-metals are?

Last Answer : Metalloids

Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature (D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Description : Metalloids (A) Are good conductor of heat & electricity (B) Act as electron donors with metals & as electron acceptor with non metals (C) Are not necessarily solids at room temperature ... & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Last Answer : D) Are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron

Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electro negativity (3) Low ionization energy (4) Malleability

Description : Which among the following is not a characteristic of transition metals? (1) Tendency to gain electrons (2) Low electro negativity (3) Low ionization energy (4) Malleability

Last Answer : (1) Tendency to gain electrons Explanation: The transition metals have a tendency to lose electrons. Since the electrons in the highest energy level are actually on a lower principal energy number than the ... makes it relatively easy to lose some or all of their electrons to land in stable state.

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Last Answer : Option A

From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. (c) The element with smallest ionic radius. (d) The element with six electrons in the valence shell. (e) The element which is a liquid at room temperature. (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.

Description : From the elements: Cl, Br, F, O, Al, C, Li, Cs and Xe; choose the following: (a) The element with highest negative electron gain enthalpy. (b) The element with lowest ionization enthalpy. ( ... . (f)The element which belongs to zero group. (g) The elements which forms largest number of compounds.

Last Answer : Ans. (a). The element chlorine (Cl) has the highest negative electron gain enthalpy. (b). The element cesium (Cs) has lowest ionization enthalpy. (c). The element fluorine F has lowest atomic radius. (d ... zero group (or group 18). (g). The element carbon (C) forms the largest number of compounds.

Which one of the following elements has valence electrons in the n = 3 shell? A beryllium B oxygen C silicon D neon E hydrogen

Description : Which one of the following elements has valence electrons in the n = 3 shell? A beryllium B oxygen C silicon D neon E hydrogen

Last Answer : C silicon

Why cesium requires little energy to release its one elecron of outermost shell?

Description : Why cesium requires little energy to release its one elecron of outermost shell?

Last Answer : The distance between the nucleus an this electron is higher.

Emission of β-particles during radioactive decay of a substance is from (A) Innermost shell (B) Nucleus (C) Outermost shell (D) None of these

Description : Emission of β-particles during radioactive decay of a substance is from (A) Innermost shell (B) Nucleus (C) Outermost shell (D) None of these

Last Answer : (B) Nucleus

The energy required to remove the electron from the outermost shell from a free and isolated atom of the element is called

Description : The energy required to remove the electron from the outermost shell from a free and isolated atom of the element is called

Last Answer : Ionisation energy.

The distance between the centre of the nucleus and the outermost electron shell of an atom is called

Description : The distance between the centre of the nucleus and the outermost electron shell of an atom is called

Last Answer : atomic size

f-block elements are also called (a) Alkali metals (b) Inner transition elements (c) Transition elements (d) Transuranic elements

Description : f-block elements are also called (a) Alkali metals (b) Inner transition elements (c) Transition elements (d) Transuranic elements

Last Answer : Ans:(b)

5 Consider a cross in which a trait is inherited by incomplete dominance. What percentage of the F2 from the matng of homozygous dominant and homozygous recessive individuals will possess the dominant phenotype?

Description : 5 Consider a cross in which a trait is inherited by incomplete dominance. What percentage of the F2 from the matng of homozygous dominant and homozygous recessive individuals will possess the dominant phenotype? a) 0 per cent b) 25 per cent c) 50 per cent d) 75 per cent

Last Answer : ANS: b 25 per cent

The chalcogen having same number of electrons both in penultimate and antipenultimate shells is

Description : The chalcogen having same number of electrons both in penultimate and antipenultimate shells is

Last Answer : The chalcogen having same number of electrons both in penultimate and antipenultimate shells is A. O B. S C. Se D. Te

The electrons in the outermost orbit of atom are: a) Valance electrons b) Static electrons c) Tightly bound d) Stationary

Description : The electrons in the outermost orbit of atom are: a) Valance electrons b) Static electrons c) Tightly bound d) Stationary

Last Answer : a) Valance electrons

_____ is the number of shells for elements of the 3rd period. (1) 2 (2) 1 (3) 0 (4) 3

Description : _____ is the number of shells for elements of the 3rd period. (1) 2 (2) 1 (3) 0 (4) 3

Last Answer : (3) 0 Explanation: The third period of the periodic table consists of the elements whose atoms has three shells occupied by electrons in its Ground State (when it is not excited or in a reaction).

An element has the following numbers of electrons in its shells: 2-8-8-2. Which of the following is true? The element: w) is a nonmetal x) forms an ion with a charge of +2 y) can accept two electrons z) forms a negative ion

Description : An element has the following numbers of electrons in its shells: 2-8-8-2. Which of the following is true? The element: w) is a nonmetal x) forms an ion with a charge of +2 y) can accept two electrons z) forms a negative ion

Last Answer : ANSWER: X -- FORMS AN ION WITH A CHARGE OF +2

How many electrons are in the outer shells aluminum?

Description : How many electrons are in the outer shells aluminum?

Last Answer : Normally, three.

How many shells and valence electrons does krypton have?

Description : How many shells and valence electrons does krypton have?

Last Answer : Need answer

What is the general rule for filling shells with electrons?

Description : What is the general rule for filling shells with electrons?

Last Answer : What is the answer ?

An inert element has electron shells that a. Overlap The Shells Of Other Atoms. b. Are Completely Filled With Electrons. c. Yield Hydrogen Ions. d. Form Covalent Bonds.

Description : An inert element has electron shells that a. Overlap The Shells Of Other Atoms. b. Are Completely Filled With Electrons. c. Yield Hydrogen Ions. d. Form Covalent Bonds.

Last Answer : b. Are Completely Filled With Electrons.

If you had a bucket that contained a mixture of sand and sea shells how might you use the physical properties of the seashells to separate them from the sand?

Description : If you had a bucket that contained a mixture of sand and sea shells how might you use the physical properties of the seashells to separate them from the sand?

Last Answer : Try to use a sieve.

Catalytic converters are generally made from (1) Alkaline metals (2) Hydrogen (3) Transition metals (4) Carbon

Description : Catalytic converters are generally made from (1) Alkaline metals (2) Hydrogen (3) Transition metals (4) Carbon

Last Answer : (3) Transition metals Explanation: Transition metals are used directly as catalysts in the anti-pollution catalytic converters in car exhausts. For example, expensive transition metals such as ... nitrogen monoxide, which are converted to the non-polluting gases nitrogen and carbon dioxide.

Why are Ti+2 and other transition metals and their ions paramagnetic ?

Description : Why are Ti+2 and other transition metals and their ions paramagnetic ?

Last Answer :  Ans: These ions have unpaired electrons in d- subshell. 

Why are transition metals and there compounds generally coloured ?

Description : Why are transition metals and there compounds generally coloured ?

Last Answer : Ans It is due to present of unpaired electrons in transition metals and their ions , that is why they absorbed light from visible region and undergoes d-d transition and radiate complementary colour . 

Why do transition metals have high enthalpy of atomization ?

Description : Why do transition metals have high enthalpy of atomization ?

Last Answer :  Ans : it is due to strong metallic bonds and additional covalent bonds 

Why are Zn , Cd , Hg are not regarded as transition metals ?

Description : Why are Zn , Cd , Hg are not regarded as transition metals ? 

Last Answer : Ans: It is because neither they nor their ions have incompletely filled d- orbitals . 

The catalytic activity of transition metals and their compounds is ascribed mainly to (1) their chemical reactivity (2) their magnetic behaviour (3) their unfilled d-orbitals (4) their ability to adopt variable oxidation states

Description : The catalytic activity of transition metals and their compounds is ascribed mainly to (1) their chemical reactivity (2) their magnetic behaviour (3) their unfilled d-orbitals (4) their ability to adopt variable oxidation states

Last Answer : (4) their ability to adopt variable oxidation states

Catalytic converters are generally made from : (1) Alkaline metals (2) Hydrogen (3) Transition metals (4) Carbon

Description : Catalytic converters are generally made from : (1) Alkaline metals (2) Hydrogen (3) Transition metals (4) Carbon

Last Answer : Transition metals