Question

Compared with an atom of atomic weight 12 and atomic number 6, the atom of atomic weight 13 and atomic number 6

• A. Contains more neutrons
• B. Contains more electrons
• C. Contains more protons
• D. Is a different element

Answer 1

Answer: (A)

Contains more neutrons

Answer 2

$6 ⥂ A^{12}$ and $6 ⥂ X^{13}$ both are isotopes but have different no. of neutrons.

$6A^{12}$, For A have$p = 6,e = 6$ and $n = 6$and $6X^{13}$,

For B have$p = 6,e = 6$and $n = 7$