Any one know these two questions answer
It is an McQ question
Pls tomorrow exam

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What overall charge must all compounds have

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?