U02 Core Concepts Review

This particle is represented by the atomic number AND is used to identify all atoms.

• Neutron

• Proton

• Electron

• Idontknowatron

What is found in the nucleus of atoms?

• Protons and electrons.
• Protons, neutrons, and electrons.
• Protons and neutrons.
• Neutrons and electrons.

Tags

NGSS.HS-PS1-8

Isotopes have the same number of ____, but different number of ____.

• neutrons; protons

• protons; electrons

• protons + electrons; neutrons

• electrons; protons

How many neutrons are in fluorine-20?

• 20

• 11

• 10

• 9

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

Tags

NGSS.MS-PS1-1

What evidence did Rutherford use to support the idea that the atom was mostly empty space?

• the vast majority of the alpha particles went through the foil unaffected.

• the vast majority of the alpha particles were deflected at 90 degrees.

• one alpha particle was deflected by the gold foil.

• beams of alpha particles were deflected by magnets.

Which is a finding attributed to Rutherford's Gold Foil Experiment?

• atoms are indivisible and have a dense positive nucleus.

• atoms are divisible and have multiple layers of electrons scattered uniformly about the atom.

• atoms are like plum pudding with positive and negative charges uniformly scattered throughout the atom.

• atoms are mostly empty space with a dense positive nucleus.

Tags

NGSS.HS-PS1-8

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Tags

NGSS.HS-PS1-8

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.HS-PS1-8