What is the smallest particle of an element that shows all the properties of that element?

• Subatomic Particles

• Atom

• Quarks

• Gluons

What scientist is best known for his "Plum Pudding" model of the atom?

• J.J. Thomson

• Ernest Rutherford
• John Dalton
• Democritus

Tags

NGSS.MS-PS1-1

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

Tags

NGSS.MS-PS1-1

Which subatomic particles have a negative charge?

• Electrons

• Neutrons

• Protons

• Quarks

Which subatomic particles have a positive charge?

• neutrons

• electrons

• protons

• gluons

Which subatomic particles are neutral in charge?

• Neutrons

• Protons

• Nucleus

• Electrons

What does the number of protons represent in an element?

• Atomic Mass

• Mass Number

• Fractal Number

• Atomic Number

What are atoms of the same element with different numbers of neutrons called?

• Ions

• Gluons

• Isotope

• Quarks

Tags

NGSS.HS-PS1-8

What is the atomic number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons