Atoms, Elements, & the Periodic Table

Which element has 2 protons?

Elements in the same _______ have similar properties.

What charge does an electron have?

Of the following groups of elements, which are considered most reactive?

Which of the following are found in the nucleus of an atom?

Of the following groups, which is most reactive?

Most elements are metals or non-metals. Which element is the only exception?

As you move down a group, what tends to happen?

The subatomic particle that can "move around" is the __________.

Elements that have properties "in-between" metals and non-metals are called what?