Which particle has a positive electrical charge?

• proton

• neutron

• electron

Which of the three particles has the smallest mass?

• proton

• neutron

• electron

Which particles make up the nucleus of an atom? (you can choose more than one answers)

• proton

• electron

• neutron

Tags

NGSS.HS-PS1-8

The size of the negative charge of an electron is exactly the same as the size of the positive charge on a proton. What is the overall charge of the helium atom shown in the diagram?

• positive

• negative

• neutral

Tags

NGSS.MS-PS1-1

How are the individual atoms held together?

• There is electrostatic attraction

• They are holding hands

• There is Earth's gravity

Tags

NGSS.HS-PS2-4

Electrons have less mass than protons do

• true

• false

Protons have a negative electrical charge

• true

• false

Electrons are found in the nucleus of the atom

• true

• false

Neutrons have the same mass as protons do

• true

• false

The plum pudding model is discovered by

• J.J. Thompson

• Ernest Rutherford

• James Chadwick

• Albert Eisntein