Question

B. Fill in the blanks.
1. Elements having valency two are called
2. The mass of an electron is about
viraland
of the mass of a hydrogen
atom.
shell has minimum energy.
3.
and
.charge as that of
A proton has an
an electron.
electron/electrons in its valence shell.
5. A chlorine atom has
Atomic Structure​

Answer 1

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