Question

While looking at calcium (Ca) on the periodic table, a student needs to find an element with a greater atomic mass in the same period. Where should the student look?

directly up
directly down
directly to the left
directly to the right

Answer 1

Directly to the right.

Across a period (left → right) atomic number — and generally atomic mass — increases. For example, Ca (≈40.08) is left of Sc (≈44.96).