Which of the following elements is not in the same catagory on the periodic table?

a ) n
b ) sb
c ) p
d ) o

What is i fracture in the crust called when land move up, down or sideways

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3