True or False: Valency is the number of protons an atom can donate or accept to form a chemical bond with another atom.

A chemical bond between two atoms is:

Number of protons in the nucleus of carbon atom is

Name the halogens that can form true chemical bonds with noble gases?

Number of protons in Sodium and Sodium ion are same. True or False

Atomic number is the sum of number of protons and neutrons.

The number of protons present in the nucleus of an atom is known as its _____

The number of valence electrons in carbon atom is

The number of electrons and proton are always equal in all atom

Valency is the number of hydrogen atoms which can combine with (or displace) one atom of the element (or radical] forming a compound'. With reference to the above definition of valency, state the valency of chlorine in hydrogen chloride, giving reasons.

True or False: An atom that gains one or more electrons to form a negative ion is called a cation.