Which of the following is isoelectronic with a carbon atom?

The charge on the atom containing $17$ protons,$18$ neutrons and $18$ electrons is

The atomic configurations of atoms $A$,$B$,and $C$ are given as: $A = [Z(90) + n(146)]$,$B = [Z(92) + n(146)]$,$C = [Z(90) + n(148)]$. Which of the following statements are incorrect?
$(a) A$ and $C$ are isotones.
$(b) A$ and $C$ are isotopes.
$(c) A$ and $B$ are isobars.
$(d) B$ and $C$ are isobars.
$(e) B$ and $C$ are isotopes.

Which of the following properties are different for neutral atoms of isotopes of the same element?

If $W$ is the mass number and $N$ is the atomic number of an element,then:

Assertion : Atoms are not electrically neutral.
Reason : Number of protons and electrons are different.