Unit 2: Atomic Theory & Structure

Which particle contributes the negative charge to the atom?

• proton
• electron
• neutron
• nucleus

Who is the first scientist to think that the atom was the smallest unit of matter?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

What scientist first developed 5 rules for atomic theory, and helped kick start modern chemistry?

• J.J. Tomson
• Ernest Rutherford
• John Dalton
• Democritus

What element is this an atom of?

• nitrogen

• lithium

• beryllium

• carbon

Flammability is an example of what property?

• Chemical property
• Physical property

Tags

NGSS.MS-PS1-2

Measure mainly of the nuclear particles: protons + neutrons

• Subatomic Particles
• Atomic Number
• Atomic Mass
• Gluons

Tags

NGSS.HS-PS1-8

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Tags

NGSS.HS-PS1-8

Value representing the number of protons in an element

• Atomic Mass
• Mass Number
• Valence Electrons
• Atomic Number

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

Atoms of the same element with a different number of neutrons

• Ion
• Gluons
• Isotope
• Quarks

Tags

NGSS.HS-PS1-8