How many groups are there in the periodic table?

What is chemistry?

What does neutrally charged mean?

What is an element?

What is a pure element?

What is a molecule?

How is a molecule formed?

What is a mixture?

What is a compound?

What is an ion?

What is an ionic compound?

What is an isotope?

What is a neutron?

What is an electron?

What is a proton?

What is an electron shell?

What are the different electron shell layers?

What is the outer shell on an electron called?

What is a nucleus?

How do you work out the number of neutrons?

How do you work out the number of electrons?

How do you work out the number of uncharged atoms?

What is the electron configuration?

What happens as electrons gain more energy?

How much energy is emitted if there is a red light?

How much energy is emitted if there is a purple light?

_____ and ____ attract each other?

What are lattices?

How many periods are there in the periodic table?

How many elements are there in the periodic table?

What is a molecule of an element

What is a Molecule of a compound?