Nuclear Physics Review

Most of the mass of an atom is located in its...

• isotopes
• electrons
• nucleus
• electric charge

What did we learn from the plum pudding model that still holds true today?

• Electrons occupy shells
• The nucleus is at the center
• Atoms are indivisible
• Atoms are not indivisible, and electrons exist

The planetary (Bohr) model of the atom is still popular today because

• shows exactly what atoms look like
• it helps us visualize things we can't see
• it's the most aesthetically pleasing
• it was the first model of the atom

The greater the number of protons in the nucleus, the

• larger the orbits of the outermost electron
• the tighter the orbits of all electrons
• the looser the inner orbits become
• the more electrically neutral the atom becomes

The number of protons in an atom tells you

• which isotope it is
• which element it is
• which molecule it is
• which atom it is

The number of nucleons (neutrons and protons) in the nucleus tells you

• which isotope it is
• which element it is
• which atom it is
• which molecule it is

The motion of subatomic particles described by quantum mechanics is governed by

• the same laws that govern us
• laws of certainty
• exact measurements
• laws of probability

In the nucleus, the strong is a relatively

• long range force
• neutralizing force
• unstable force
• short range force

Uranium-235, Uranium-238, and Uranium-239 are different

• ions
• elements
• isotopes
• nucleons

Tags

NGSS.HS-PS1-8

A certain element emits 1 alpha particle.  The atomic number of the resulting element is changed by...

• zero
• minus 1
• minus 2
• minus 4

Tags

NGSS.HS-PS1-8