JAMB - Chemistry (2009 - No. 7)

If an atom is represented as \( _{11}^{23}X \), which of the following deduction is correct?

it contains 12 protons

it forms a covalent chloride

its atomic number is 23

it is an alkali metal

Sodium has atomic / proton number of 11 and belongs to Group 1[alkali metals] on the periodic table