Intro to 6th Grade Science

The lightest element

This element has 4 protons

The elements that don't react with other elements are called

This element is in group 2

The 4 elements that make up most of living things are:

This elements has 8 electrons

Of H, Na, Ca and C, the one that's a gas at room temperature.

These two elements combine to make water

This is a poisonous gas