Exam 1 Review

What charge does a proton have?

• positive

• negative

• neutral

What charge does an electron have?

• positive

• negative

• neutral

What charge does a neutron have?

• positive

• negative

• neutral

Atoms are made up of what subatomic particles?

• Protons

• Electrons

• Neutrons

• All the above

What is Atomic Number?

• the number of protons in the nucleus

• the number of neutrons in the nucleus

• the number of electrons in the nucleus

• just a fancy number

Elements are pure substances

• True

• False

What is Atomic Mass?

• number of protons and electrons

• number of electrons and neutrons

• number of protons and neutrons

• just a fancy number

How many chemical elements does the periodic table represent?

• 117

• 118

• 119

• 120

How do you find the electrons in an atom?

• By subtracting the charge from the atomic number

• By subtracting the charge from the mass number

• by looking at the atomic number

• by looking at the mass number

What is one of the 6 elements needed for life?

• Magnesium

• Sodium

• Lithium

• Oxygen