Question

2. Which of the following is true about the Periodic Table of elements?
(A) The horizontal rows are called groups.
(B) The vertical columns are called periods.
(C) Elements in the same group have very different properties.
(D) Elements in the same period show a gradual change from metallic
non-metallic properties.
(​

Answer 1

Answer:

D

Explanation:

Answer 2

Answer:

d

Explanation:

along a period, atomic radii decrease ... electron releasing tendency decrease .... more nonmetallic character