Unit 2 Topic 3-5 Flashcards
1
Q
Dalton’s atomic Theory
A
- All mater is made of atoms
- Atoms can’t be destroyed, created, or divided
- Atoms of one element are identical in mass and size
- Compouds are made of different elements in fixed proportions (eg. 11% hydrogen, 89% oxygen)
2
Q
Chemical Family
A
Group of related elements with similar properties
3
Q
Conductivity
A
The ability to carry a electric current
4
Q
Electrolysis
A
Process of breaking a compound by passing a electric current
5
Q
Proton
A
Positive particles
6
Q
Neutron
A
Neutral particles
7
Q
Electron
A
Negative particle
8
Q
Atmoic Nucleus
A
Center of the atom that contains protons and neutrons
9
Q
Atomic Number
A
Number of protons in an atom
10
Q
Atomic Mass
A
Average mass of an atom
11
Q
Mass number
A
Number of protons and neutrons
12
Q
Molecule
A
Smallest independant unit in a pure substance
13
Q
Law of Conservation of Mass
A
Mass of new substance is the same as the original substances
14
Q
Law of definate composition
A
Compouds are made of different elements in fixed proportions
