Chemistry
(a) What are inert elements?
(b) Why do they exist as monoatoms in molecules?
(c) What are valence electrons?
Atomic Structure
88 Likes
Answer
(a) Elements with the valence shell having 8 electrons and helium with 2 electrons, cannot gain or lose electrons so they are chemically inactive and are called inert elements.
(b) Inert elements exist as monoatoms because they have a completely filled outermost electron shell. This makes them very stable and unlikely to form chemical bonds with other atoms. Hence, they tend to exist as monoatoms in molecules rather than participating in chemical reactions.
(c) Electrons present in the outermost shell (i.e., valence shell) of an atom are valence electrons.
Answered By
56 Likes
Related Questions
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.
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.
In what respect do the three isotopes of hydrogen differ ? Give their structures.
What is the significance of the number of protons found in the atoms of different elements?