JUS Modelling Atoms Grade 9

What determines the isotope identity of an element?

• Number of protons

• Number of electrons

• Number of neutrons

• Number of atoms

This tells the number of protons in an atom

• mass number

• atomic number

• atomic mass

• isotopes

Subatomic particle with a negative charge

• proton

• neutron

• electron

• isotope

Subatomic particle with a positive charge

• proton

• neutron

• electron

• isotope

Subatomic particle with no charge

• proton

• neutron

• electron

• isotope

dense center of an atom

• nucleus

• proton

• electron cloud

• electron region

protons plus neutrons

• atomic mass

• atomic number

• isotopes

• chemical symbol

If an atom has 20 protons, 29 neutrons and 19 electrons its atomic number is

What is the mass number of an atom with 10 protons, 15 neutrons, and 10 electrons

What is found outside of the nucleus of an atom?

• Protons

• Neutrons

• Electrons

• Garfinkeltrons