Chapter 1 Flashcards
1
Q
Dalton’s Atomic Theory
A
- all matter consists of individual particles called atoms. 2. All atoms of 1 element are identical (not true anymore). 3. different elements have different atoms. 4. Atoms are indestructible.
2
Q
Who “Discovered” the Electron
A
Thompson + Millikan
3
Q
Who “Discovered” the Proton
A
Rutherford
4
Q
Who “Discovered” the Neutron
A
Chadwick + Rutherford
5
Q
What are Laws
A
reliable observations
6
Q
What are Theories
A
models of behavior (explanations)
7
Q
Atomic Number
A
Number of Protons in an elements nucleus
8
Q
Mass Number
A
Number of Protons and Neutrons in an elements nucleus
9
Q
Isotopes
A
Variations of an element with same number of protons and electrons but different number of neutrons
10
Q
Pure Substance
A
- Have one or many components. 2. Can only be separated by chemical means.
11
Q
Mixtures
A
- Always has many components 2. Can be separated by physical means
12
Q
Single Components
A
Elements
13
Q
Multi-Components
A
Compounds made from various elements
14
Q
Homogenous mixture
A
Even distribution throughout
15
Q
Heterogenous mixture
A
Uneven distribution throughout
