Description : Atoms which give up electrons easily are called
Last Answer : electro-positive.
Description : Benzene undergoes substitution reaction more easily than addition reaction because (a) it has a cyclic structure (b) it has three double bonds (c) it has six hydrogen atoms (d) there is delocalization of electrons
Last Answer : there is delocalization of electrons
Description : The branch of physics that deals with the investigation of wavelengths of electro magnetic radiation emitted or absorbed by atoms is known as a) spectroscopy b) astroscopy c) radioscopy d) stereoscopy
Last Answer : a) spectroscopy
Description : Electro magnetic radiation is emitted by (a) X-ray (b) Electrons (c) Ultrasonic (d) Protons
Last Answer : Ans:(b)
Description : Why ABC is considered electro-mechanical computer? A) Because it was invented before electronic computers were developed B) Because there are wheels, drums, bars to rotate and move to produce result C) Because they use the flow of electrons in different component D) None of above
Last Answer : Answer : B
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.
Description : Pick up the incorrect statement from the following. Intake of water supply should (A) Be nearer to the treatment plant (B) Receive water from purer zone of the source (C) Be located downstream of waste water disposal point (D) Remain easily accessible during floods
Last Answer : (C) Be located downstream of waste water disposal point
Description : What are materials called that do not easily give up or take on electrons?
Last Answer : Thede are unreactive elements.
Description : The relative tendency of the atoms to at- tract electrons in chemical reactions is called?
Last Answer : Electronegativity
Description : The bonds formed by sharing of electrons between the atoms is called?
Last Answer : Covalent bond
Description : Elements in which electrons of their atoms occupy ultimate shells leaving penultimate shells partially vacant are called
Last Answer : transition elements.
Description : An element having large number of __________ is most easily subjected to nuclear fission. (A) Protons (B) Electrons (C) Neutrons (D) Nucleons
Last Answer : (D) Nucleons
Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.
Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation
Description : Atoms having same no of neutron but different no of electrons or protons are called –
Last Answer : Isotones
Description : Atoms with varying mass numbers are called ________. a. Electrons b. Ions c. Isotopes d. Neutrons
Last Answer : c. Isotopes
Description : Atoms having same no of neutron but different no of electrons or protons are called
Description : Metals are good conductors of electricity because (a) The contain free electrons (b) The atoms are lightly packed (c) They have high melting point (d) All of the above
Description : Which of the following is not characteristic of resonance? (a) The canonical structures have the constituent atoms in the same relative positions (b) They have nearly the same energy (c) ... of unpaired electrons (d) The actual structure can be represented on paper using the conventional symbols
Last Answer : Ans:(d)
Description : We all know atoms have a lot of empty space on the orbiting electrons, so would it be possible for another world to exist right here where we are that we are not aware of?
Last Answer : Isn’t that like string theory?
Description : (a) Show on a diagram the transfer of electrons between the atoms in the formation of MgO. Write symbols of cation and anion present in MgO. (b) Name the solvent in which ionic compounds are generally soluble. (c) Why are aqueous solutions of ionic compounds able to conduct electricity? -Chemistry
Last Answer : (b) Ionic compounds are soluble in water. (c) It is because aqueous solutions consist of ions which can move freely in them and carry current.
Description : (a) Show the formation of Na2O by the transfer of electrons between the combining atoms. (b) Why are ionic compounds usually hard? (c) How is it that ionic compounds in the solid state do not conduct electricity but they do so when in molten state? -Chemistry
Last Answer : (b) It is due to strong force of attraction between oppositely charged ions. (c) In solid state, ions are not free to move whereas in molten state ions are free to move, therefore, they conduct electricity in molten state.
Description : A(n) _____ bond forms when two atoms share one or more pairs of electrons?
Last Answer : covelent
Description : Is A nonpolar bond is formed when two atoms share electrons unequally?
Last Answer : No. A polar bond is formed when electrons are sharedunevenly.A nonpolar bond indicates even sharing of electrons.
Description : The temporary effect in which there is a complete transfer of shared pair of `pi-` electrons to one of the atoms joined by a multiple bond on the dema
Last Answer : The temporary effect in which there is a complete transfer of shared pair of `pi-` ... effect C. hyperconjugation D. negative resonance effect
Description : What identification bond characterized by the sharing of electrons between atoms?
Last Answer : This is the covalent bond.
Description : The atoms of which elements tend to gain electrons?
Last Answer : Nonmetals tend to gain electrons.
Description : What bonds involve sharing of electrons between atoms?
Last Answer : Covalent bonds and Ionic bonds.
Description : Why do atoms with a weak electronegativity like lithium have a weak attractive force for electrons?
Last Answer : they have few valence electrons and aren't close to having eightvalence electrons
Description : When Atoms with a high electronegativity like oxygen have a strong attractive force for electrons because?
Last Answer : A. they're close to filling their outer shell, fulfilling the octet rule
Description : What are two or more atoms sharing electrons?
Last Answer : This is a covalent bond.
Description : In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?
Last Answer : What is the answer ?
Description : What Atoms that have the same number of outer electrons?
Last Answer : Need answer
Description : If two chlorine atoms were to attract electrons from two calcium atoms?
Description : How does the number of separate electrons shown for the group 2 metal atoms compare to the number of atoms?
Last Answer : The number of electrons in a neutral atom is equal to the atomic number.
Description : What happens when 2 nitrogen atoms share electrons?
Last Answer : they form a covalent bond
Description : What is a chemical bond that occurs when atoms share electrons?
Description : atoms with low ionization energy give up their outer valence electrons with ease?
Last Answer : trueapex
Description : Which of these statements is false All atoms are alike. All electrons are alike. All neutrons are alike. All protons are alike.?
Last Answer : True statements: All neutrons are alike, all electrons are alike, all protons are alike (All atoms of a given isotope is only alike). False statement: All atoms are alike All atoms are not alike as they may vary in the number of protons / electrons / neutrons.
Description : Atoms like sodium and lithium often lose electrons, which makes them?
Last Answer : cations
Description : Atoms with a low electronegativity, like lithium, have a weak attractive force for electrons because?
Last Answer : They have few valence electrons and aren’t close to having eight valence electrons
Description : The lone pair of electrons at one of the ring nitrogens in the given amino acid makes a potential ligand, which is important in binding the iron atoms in hemoglobin: (A) Tryptophan (B) Threonine (C) Histidine (D) Serine
Last Answer : Answer : C
Description : Diamond does not conduct electricity, because - (1) It's structure is very compact (2) It is of crystalline nature (3) There are only carbon atoms present in it (4) No free electrons are present in it
Last Answer : (4) No free electrons are present in it Explanation: Diamond has a giant molecular structure. Each carbon atom is covalently bonded to four other car-bon atoms. There are no ... conduct electricity. Except for most blue diamonds, which are semiconductors, diamonds are good electrical insulators.
Description : Rutherford's scattering experiment proved the presence of – (1) atoms in all matter (2) electrons in atoms (3) neutrons in atoms (4) nucleus in atoms
Last Answer : (4) nucleus in atoms Explanation: On the basis of his experiment, Rutherford put forward the model of an atom, which had the following features: There is a positively charged centre in an atom called the nucleus.
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
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
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 : The isotope atoms differ in - (1) number of neutrons (2) atomic number (3) number of electrons (4) atomic weight
Last Answer : (1) number of neutrons Explanation: Important to note that isotope atoms have same atomic number.