C2-3 Atoms, Ions and Isotopes

Two numbers are found with an element in the periodic table. Which is which?

• A - Proton number

  B - Atomic number

• A - Mass number

  B- Proton number

• A - Atomic number

  B - Mass number

• A - Proton number

  B - Mass Number

Ions form when atoms (or groups of atoms) gain or lose electrons.

How do negative ions form?

• ...when atoms lose electrons and have more electrons than protons

• ...when atoms gain electrons and have more protons than electrons

• ...when atoms gain electrons and have more electrons than protons

• ...when atoms lose electrons and have more protons than electrons

Elemets in the periodic table are in order of their atomic number but also have a mass number.

What does this number tell us?

• The number of protons and electrons in an atom

• The number of nuclei in an atom

• The number of protons and particles in an atom

• The number of nuclear particles in an atom

What is an isotope?

• Isotopes have the same number of electrons but different numbers of neutrons

• Isotopes have the same number of protons but different numbers of electrons

• Isotopes have the same number of electrons but different numbers of protons

• Isotopes have the same number of protons but different numbers of neutrons

Which two atoms are isotopes?

• Q and S

• Q and T

• R and T

• R and S

Which two particles are isotopes?

• A and B

• C and D

• B and E

• A and D

Which information is correct for the element shown?

• 6 electrons

  6 protons

  6 neutrons

• 6 electrons

  6 protons

  12 neutrons

• 12 electrons

  12 protons

  6 neutrons

• 12 electrons

  6 protons

  6 neutrons

Which information is correct for the element shown?

• 7 electrons

  14 protons

  21 neutrons

• 7 electrons

  14 protons

  14 neutrons

• 7 electrons

  7 protons

  7 neutrons

• 14 electrons

  7 protons

  7 neutrons

Which information is correct for the element shown?

• 8 electrons

  15 protons

  16 neutrons

• 8 electrons

  8 protons

  15 neutrons

• 8 electrons

  8 protons

  8 neutrons

• 15 electrons

  8 protons

  8 neutrons

Which information is correct for the element shown?

• 42 electrons

  54 protons

  95 neutrons

• 42 electrons

  42 protons

  45 neutrons

• 42 electrons

  42 protons

  54 neutrons

• 45 electrons

  42 protons

  42 neutrons