Question

Define the following:-
a. Atomic no
b. Mass no
c. electronic configuration
d. Valency

Answer 1

Atomic no.

The number of protons in the nucleus of an atom, which is characteristic of a chemical element and determines its place in the periodic table.

Mass no.

The total number of protons and neutrons in a nucleus.

Electronic configuration

the electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. For example, the electron configuration of the neon atom is 1s² 2s² 2p⁶,

Valency

The combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with.

"carbon always has a valency of 4

Hope this answer helps you

Plz fallow me