Question

Which of these would BEST describe the structural difference between magnesium and aluminum?

A) Magnesium has one more proton than aluminum.
B) Magnesium has one less proton than aluminum.
C) Magnesium's atomic mass is larger than aluminum's.
D) Aluminum has more protons and fewer neutrons than magnesium.

Answer 1

B) Magnesium has one less proton than aluminum. The number of protons is shown in the left corner. Magnesium has 12 and aluminum has 13.

Answer 2

Hello.

The answer is: B) Magnesium has one less proton than aluminum.

Magnesium atomic number is 12 while Aluminium's is 13. This means 1 more proton and weights more than magnesium since proton and neutrons contribute to the weights of the atoms.

Have a nice day