Exam 1 Flashcards
1
Q
Define Chemistry
A
Study of matter and the changes it undergoes
2
Q
Matter
A
Physical material of universe (mass,volume,takes up space)
3
Q
Compound
A
Substance made of two or more atoms
4
Q
Molecule
A
Composed of two or more atoms
5
Q
Molecule
A
Composed of two or more atoms
6
Q
Every compound is a
A
Molecule
7
Q
Not all elements are
A
Molecules
8
Q
Kinds of atoms
A
Compositions
9
Q
Arrangements
A
Structure
10
Q
Homogeneous
A
All the same with no visible differences
11
Q
Heterogeneous
A
Can observe differences
12
Q
Pure substances
A
Matter that cannot be separated into other kinds of matter by physical means
13
Q
Physical change
A
Doesn’t change the identity of compound when measured or observed
14
Q
Chemical change
A
Change in type of matter
15
Q
Giga
A
G 10⁹
16
Q
Giga
A
G 10⁹
17
Q
Mega
A
M 10⁶
18
Q
Mega
A
M 10⁶
19
Q
Kilo
A
k 10³
20
Q
Deci
A
d 10^-1
21
Q
Centi
A
c 10^-2
22
Q
Milli
A
m 10^-3
23
Q
Micro
A
ų 10^-6
24
Q
Nano
A
n 10^-9
25
Pico
p 10^-12
26
Precision
Describes the reproducibility of the results (how often the same answer)
27
Accuracy
Indication between accepted /true and measured values
