Atomic Structure Flashcards
1
Q
Atomic Theory:
Elements are composed of
A
Semi-identical atoms
2
Q
Atomic Theory:
In ___ reactions, atoms are
A
Chemical
Not changed
3
Q
Atomic Theory:
_____ are formed when
A
Compounds
Atoms of 2 or more elements combine
Ie h2o
4
Q
Multiple Proportions:
Atoms join together in ____ ratios to form ____
A
Different
Different compounds
5
Q
_____ and ______ were key to determining atom _____
A
Electricity (+) (-)
Radioactivity (subatomic particles)
Structure
6
Q
Electrons
A
(-)
Equal to number of protons
7
Q
Neutrons
A
(No charge)
8
Q
Protons
A
(+)
Number of protons = atomic number
9
Q
Mass Number
A
p+ + n = mass #
10
Q
Atomic number
A
Protons
11
Q
Charge
A
Electrons
