Convert 45 mm to centimeters.

4.5cm

Explanation:

4.5 centimeters

Explanation:

1 mm = 0.1 centimeters

45 x 0.1 = 4.5

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

bcde is the incorrect answer it is a