Exam Review- Chapter 2 Flashcards
1
Q
The three particles of atoms and their charge…
A
Proton- positive
Electron- negative
Neutron- neutral
2
Q
The simplest part of an element
A
Atom
3
Q
Substances that cannot be broken down
A
Elements
4
Q
How do enzymes affect chemical reactions?
A
They speed them up
5
Q
True or False- Our cells contain thousands of enzymes that each control a different reaction
A
True
6
Q
When a molecule or an atom gains an electron, it becomes…
A
Negative
7
Q
When a molecule or atom loses an electron, it becomes…
A
Positive
8
Q
A neutral solution has an equal number of ____ and ____ ions
A
positive, negative
9
Q
True or False- A solution with a pH of 13 is acidic
A
False
10
Q
A molecule with two oppositely charged ends
A
polar molecule
