RPA Science - Atomic Structure

What does the atomic number of an atom represent?

• Atomic mass

• Number of electrons

• Number of neutrons

• Number of protons

What is the mass number of an atom?

• Atomic mass

• Number of neutrons

• Number of protons

• Number of electrons

How can you calculate the number of neutrons in an atom?

• Divide the atomic number by the mass number

• Multiply the atomic number and mass number

• Add the atomic number and mass number

• Subtract the atomic number from the mass number

What happens when an atom gains or loses electrons?

• It becomes an ion

• It becomes an isotope

• It becomes a different element

• It becomes a compound

What is an isotope?

• A form of an element with different numbers of protons and neutrons

• A different type of atom

• A compound formed by atoms of different elements

• A different element

What is the atomic number of carbon?

• 5

• 6

• 7

• 8

What is the mass number of an atom of carbon-14?

• 14

• 15

• 12

• 13

How many neutrons does an atom of carbon-12 have?

• 5

• 6

• 7

• 8

How many neutrons does an atom of deuterium have?

• 1

• 0

• 3

• 2

What is the same in all isotopes of hydrogen?

• Number of neutrons

• Atomic mass

• Number of protons

• Number of electrons