What are elements made of?

How many types of atom does an element contain?

How many types of atom does a compound contain?

What is the basic structure of an atom?

What are atoms made of?

What kind of charge does an electron have?

What kind of electric charge does a neutron have?

What kind of electric charge do protons have?

What is an atomic number?

What is a mass number?

How are atoms arranged in the periodic table?

How are electrons arranged in an atom?

What determines the way an element reacts?

Why are the atoms of Group 0 elements so unreative?

What does the formula of a compound show?

What is formed when a metal reacts with a non metal?

What happens in ionic bonding?

What is covalent bonding?

Can we create new atoms?

What is a balanced equation?

How is the total mass of reactants related to the total mass of the product?