ATOMIC STRUCTURE & CHEMICAL BONDING IX

Front

An atom with 3 protons and 4 neutrons will have a valency of

Back

3

Front

The only inert gas which has a complete duplet is: Krypton, Neon, Argon, Helium

Back

Helium

Front

Number of valence electrons in O^2- are:

Back

8

Front

The valency of which element is zero?

Back

helium

Front

Characteristic property of an electrovalent compound

Back

It has high melting point

Front

When a metal atom becomes an ion, what happens?

Back

It loses electrons & is oxidized.

Front

An atom has the mass number 35 & the atomic number is 17. The number of neutrons in its nucleus are:

Back

18

Front

Isotopes have different mass numbers because their nuclei contain different numbers of: proton, electron, neutron, positron

Back

neutron

Front

The chemical bond formed between mutual sharing of electrons between the two combining atoms.

Back

covalent bond

Front

The number of electrons lost or gained by an atom refers to

Back

electrovalency