Grade 8 5.1.2 The structure of atom

Atoms are made of protons, neutrons, and ________.

• electrons
• negative
• no
• proton

The nucleus contains ________ and neutrons.

• protons
• positive
• electron
• neutron

Electrons have a ________ electrical charge.

• negative
• no
• proton
• electrostatic

Protons have a ________ electrical charge.

• positive
• electron
• neutron
• through

Neutrons have ________ charge.

• no
• proton
• electrostatic
• electrons

J.J. Thompson discovered the ________.

• electron
• neutron
• through
• protons

Rutherford discovered the ________ and the nucleus.

• proton
• electrostatic
• electrons
• negative

James Chadwick discovered the ________.

• neutron
• through
• protons
• positive

The force that holds the atom together is called ________ attraction.

• electrostatic
• electrons
• negative
• no

In Rutherford’s experiment, most particles passed ________ the gold foil.

• through
• protons
• positive
• electron