Chemistry
Name the following:
(a) The element which does not contain any neutron in its nucleus.
(b) An element having valency 'zero'.
(c) Metal with valency 2
(d) Two atoms having the same number of protons and electrons but different number of neutrons.
(e) The shell closest to the nucleus of an atom.
Atomic Structure
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Answer
(a) Hydrogen
(b) Helium
(c) Magnesium
(d) Isotopes
(e) K shell
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Related Questions
Atoms combine to attain an electronic configuration similar to their nearest :
- Metals
- Noble gas
- Non-metals
- Semi metals
Isotopes differ in the number of their:
- Electrons
- Protons
- Neutrons
- Electrons and protons
Match the atomic numbers 4, 14, 8, 15 and 19 with each of the following :
(a) A solid non-metal of valency 3.
(b) A gas of valency 2.
(c) A metal of valency 1.
(d) A non-metal of valency 4.
(a) What are inert elements?
(b) Why do they exist as monoatoms in molecules?
(c) What are valence electrons?