Atomic Structure
JAMB UTME Chemistry

An atom that has lost an electron becomes a:

The chemical symbol for sodium is:

The valency of oxygen is:

Moles in 36 g of H₂O (M=18).

Most abundant gas in atmosphere.

Electronic config of Na (Z=11).

Isotopes have the same:

Maximum electrons in second shell (L).

Atomic number of carbon.

An atom of sodium (Na, Z=11) has electron configuration:

Isotopes of an element have the same:

The maximum number of electrons in the second shell (L) of an atom is:

The number of neutrons in an atom of ⁴⁰₂₀Ca is: