The element phosporus is located to the right of the element magnesium along the same period in the periodic table.

which best describes the relationship of the elements?

magnesium has a larger atomic number.
phosphorus has a larger atomic mass.
magnesium is in the same category as phosphorus.
phosphorus has similar chemical properties as magnesium.

Phosphorus has larger atomic mass.

Explanation:

Magnesium and phosphorus both are present in period three.

From given statements the only option B is correct relation between both elements.

The other options are incorrect:

A= Magnesium has larger atomic number

It is incorrect because the atomic number of magnesium is smaller than phosphorus. The atomic number of magnesium is 12 and phosphorus is 15.

C = Magnesium is same category as phosphorus.

Both are different because of different number of group.

D = Phosphorus has similar chemical properties as magnesium.

Both have different properties. The elements in same group have similar properties. Magnesium is present in group two while phosphorus is present in group 15. Thus both have different properties.

B

Explanation:

lithosphere and asthenosphere