Unit 2

Question 1

Atoms with the same number of protons, different
number of neutrons

Answer 1

Isotopes

Question 2

Describe likely
position of electrons as they
move around the nucleus

Answer 2

Orbitals

Question 3

represent energy levels
based on distance from
nucleus

Answer 3

Shells

Question 4

positive charge
– Fewer electrons than protons

Answer 4

Cations

Question 5

negative charge
– More electrons than proton

Answer 5

Anions

Question 6

Even nonpolar molecules have regions that are
(briefly) positively or negatively charged
– Electrons move continuously and may accumulate by chance
in one region, then another

Answer 6

Van der Waals Interaction

Question 7

nteractions are weak and occur
when molecules (or parts of molecules) are very
close togethe

Answer 7

Van Der Waals reactions