What is an element?

• Fire, water, earth, air
• A type of car
• A molecule
• The simplest pure substance

What is a proton?

• A positively charged particle in the nucleus of an atom.
• A negatively charged particle 
• A neutrally charged particle in the nucleus of an atom.
• A professional ton

What is a neutron?

• A positively charged particle in the nucleus of an atom.
• A negatively charged particle 
• A neutrally charged particle in the nucleus of an atom.
• A professional ton

What is an electron?

• A positively charged particle in the nucleus of an atom.
• A negatively charged particle 
• A neutrally charged particle in the nucleus of an atom.
• A professional ton

What is the nucleus of an atom?

• The atom's brain
• The electrons of an atom
• The center of an atom, composed of protons and neutrons
• Composed of nucleons

What determines an element's atomic number?

• The number of protons
• The number of neutrons
• The mass
• The number of molecules

A neutral atom has the same 

• number of protons and neutrons
• number of protons and electrons
• number of electrons and neutrons
• number of atoms as Adam

A molecule is

• two or more atoms bonded together
• one type of atom
• smaller than an atom 
• an element

Name this compound: H₂O

• Water
• Carbon dioxide
• Hydrogen peroxide 
• Sulfuric acid

What atoms make up a water molecule

• 1 hydrogen, 1 oxygen
• 1 hydrogen, 2 oxygen
• 2 hydrogen, 1 oxygen
• 1 water