Description : An element with atomic number 36 belongs to the (a) s-block (b) p-block (c) d-block (d) f-block
Last Answer : Ans:(b)
Description : An element of atomic no. 29 belongs to (1) s-block (2) d-block (3) p-block (4) f-block
Last Answer : (2) d-block Explanation: Copper (Cu) has the atomic number of 29. Copper belongs to the d-block which is the collective name for Groups 3 to 12 in the periodic table. Most of the d-block elements are considered to be metals, with a common lustrous metallic appearance.
Last Answer : d-block
Description : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.
Last Answer : What are the valence electrons? For s-block and p-block elements show that number of valence electrons is equal to its group number.
Description : What does an atomic number represent?
Last Answer : It is the number of protons in the nucleus of the atom and it determinnes many properties of the atom. The atomic number is also the number of electrons and is a constant for every element
Description : Find out the s - block elements compounds importance/uses.
Last Answer : Find out the s - block elements compounds importance/uses.
Description : The tendency for complex formation is maximum in (a) s-block elements (b) p-block elements (c) noble gases (d) d-block elements
Last Answer : Ans:(d)
Description : The elements of the s-block and pblock are together referred to as?
Last Answer : Representative elements
Description : The binary compound of Hydrogen with S block elements are called as ------------------
Last Answer : Ans: ionic hydride
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.
Description : Which elements of s- block are largely found in biological fluids & what is its importance?
Last Answer : Mono valent sodium and potassium ions and divalent magnesium and calcium ions are found in large proportions in biological fluids. These ions perform important biological functions such as maintenance of ion balance and nerve impulse conduction.
Description : What are s- block elements?
Last Answer : s-block elements are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table.
Description : The order of increasing size of atomic radii among the elements O,S,Se and As
Last Answer : The order of increasing size of atomic radii among the elements O,S,Se and As A. `AsltSltOltSe` B. `SeltSltAsltO` C. `OltSltAsltSe` D. `OltSltSeltAs`
Description : Component 'C' in section 'I' shown in the illustration represent ____________. EL-0093 A. a selectable holding coil arrangement B. a 'fuse blown' indicator circuit C. 'reset' and 'trouble' lamps D. a handset with switch and voice elements
Last Answer : Answer: D
Description : As shown in the illustration, which of the elements listed does the line 'B' represent in the basic schematic symbol of a PNP transistor? EL-0068 A. Base B. Emitter C. Cathode D. Collector
Description : In________, the phase of thecarrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. A) ASK B) PSK C) FSK D) QAM
Last Answer : PSK
Description : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic number 90 and atomic mass 234, the
Last Answer : A radioactive element A on disintegration gives two elements B and C. If B is helium and C is the element of atomic ... )^(234)Th` D. `._(91)^(234)Pa`
Description : How do the elements in period 4 to show the physical state of the elements changes as the atomic number increases?
Last Answer : The last members are bromine (liquid) and krypton (gas).
Description : Are the elements on the periodic table organized by their atomic number?
Last Answer : Yes. The elements are arranged in increasing order of atomic number.
Description : What element has an atomic number lower than that of aluminum and one less valence electron than group 16 elements?
Last Answer : Nitrogen
Description : There are two elements calcium (atomic number 20) and argon (atomic number 18) The mass number of both the elements is 40. They are therefore known as (a) isotones (b) isochores (c) isobars (d) isotopes
Last Answer : Ans:(c)
Description : Atoms of different elements have - (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configuration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons
Last Answer : (3) different atomic number and different number of valence electrons Explanation: Each element's atoms have a different number of protons, neutrons, and electrons, which is why they have different ... Their reactivity also varies because of the number and activeness of the electrons in the atom.
Description : What are isobars? (1) Elements with same atomic number but different mass number (2) Elements with different atomic number but same mass number (3) Elements with different atomic number and different mass number (4) Elements with same atomic number and same mass number
Last Answer : (2) Elements with different atomic number but same mass number Explanation: Isobars are atoms of different chemical elements that have the same number of n cleons. Correspondingly, isobars differ in atomic number (number of protons) but have the same mass number.
Description : Atomic number of which of the following elements is greater than that of Fluorine? (1) Sodium (2) Beryllium (3) Nitrogen (4) Boron
Last Answer : (1) Sodium Explanation: Sodium has higher atomic number (11) than Fluorine (9) The atomic number of Beryllium and Nitrogen are 4 and 7 respectively.
Description : Which of the following elements has the atomic number greater than that of Phosphorus? (1) Aluminium (2) Silicon (3) Chlorine (4) Magnesium
Last Answer : (3) Chlorine Explanation: Chlorine is a chemical element with symbol Cl and atomic number 17. Phosphorus is a chemical element with symbol P and atomic number 15.
Description : This scientist gave the law- ‘Properties of elements are a periodic function of their atomic number.’ This property of the fundamental importance of atomic number was discovered by- (1) Johann Wolfgang Döbereiner (2) John Newlands (3) Dmitri lvanovich Mendeléev (4) Henry Moseley
Last Answer : (4) Henry Moseley Explanation: In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass as described below.
Description : When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as (A) Isomers (B) Isotopes (C) Isobars (D) Isotones
Last Answer : (D) Isotones
Description : Who Classified Elements based on atomic number?
Last Answer : Moseley
Description : Elements with atomic number 89-103 are known as?
Last Answer : Actinides (radio active rare earths)
Description : Elements with atomic number 57-71 are known as?
Last Answer : Lanthanides (rare earths)
Description : Elements having same mass number and different atomic number are known as?
Last Answer : Isobars Eg: calcium — 40; Argon - 40
Description : What is the significance of atomic number in the modern classification of elements?
Last Answer : In the modern classification, elements are arranged in the increasing order of their atomic numbers.
Description : Atomic mass is not useful to construct the periodic table. Give reasons with an example. OR Why is atomic number is more useful than atomic mass to classify the elements?
Last Answer : Isotopes of an element have same atomic number but different atomic mass. They have to be placed in four places. This creates confusion because other elements occupied these positions.
Description : Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same (A) Period increases (B) Period decreases (C) Group increases (D) Both 'b' & 'c'
Last Answer : Option D
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
Description : Name this chemical element. The principal use of this element has been in solid-state electronic devices, notably transistors. Its position in the periodic table is in group "4A". The element's atomic number is 32 and its chemical symbol is Ge.
Last Answer : ANSWER: GERMANIUM
Description : I will be describing a chemical element. Try to identify it with the fewest number of clues. This chemical element is a silver-white metal, with bluish tinge, capable of taking a high polish. T element ... crust and used to make drink cans. The atomic number of this element is 13. Name t element.
Last Answer : ANSWER: ALUMINUM
Description : 1. Where do Sweat glands occur in greatest number? 2. What is the electorate for a Panchayat? 3. The cause of fractional atomic weights of elements? 4. The second largest river basin in India is ... 19. Why does Mumbai receives more rainfall than Pune? 20. What was the real name of Tantiya Tope?
Last Answer : Answer : 1 1. In the skin of the armpits 2. The Gram Sabha 3. The presence of Isotopes 4. Godavari 5. Guru Hargovind 6. Friedrich Engels 7. Cooperation 8. 30 9. Krishna Basin 10. ... Birds from reptiles 18. Dr. Rajendra Prasad 19. Because mumbai is on the windward side 20. Ramchandra Panduranga
Description : Atoms of different elements have (1) same atomic number and same electronic configuration (2) different atomic number and same eletronic configu-ration (3) different atomic number and different number of valence electrons (4) same number of electrons and neutrons
Last Answer : different atomic number and different number of valence electrons
Description : What are d block elements?
Last Answer : The d-block contain elements from group 3 to 12.
Description : What are the properties of 'f ' block elements?
Last Answer : they are of two types lanthanides and actinides
Description : f-block elements are also called (a) Alkali metals (b) Inner transition elements (c) Transition elements (d) Transuranic elements
Description : Which of the following circuit elements is used to 'block' DC in an electronic circuit? (1) Resistances (2) Capacitance (3) Inductance (4) Diode
Last Answer : (2) Capacitance Explanation: A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. Capacitors are widely used ... electric power transmission systems for stabilizing voltage and power flow, and for many other purposes.
Description : In addition to testing the calibration of a circuit breaker, maintenance should include all of the following EXCEPT ______________. A. changing out of magnetic elements and thermal heaters yearly B. ... for loose or missing parts D. making sure foreign matter does not block tripping element
Last Answer : Answer: A
Description : Give 3 features of p- block Elements.
Last Answer : Ans: (i) some of them are non metals especially those heading all the groups. ( ii) Moving down the group metallic character increases (iii) Many of them are highly electronegative and form covalent compound
Description : How many elements are found in 4Th period in d- block?
Last Answer : Ans: 10 elements
Description : In p block elements which group is known as halogens and chalcogens?
Last Answer : Ans: 17 =halogen 16=chalcogens