Atoms and their Components Flashcards
1
Q
Modern Atomic Theory
A
All elements are made up of individual particles called atoms. Atoms differ among elements. Atoms are the smallest units. -JOHN DALTON
2
Q
Rutherford & Alphaparticles
A
- Positive atoms are concentrated
- Most of atom = empty space
- Protons + neutrons = atomic nucleus.
- Electrons = very far outside/away from nucleus. In another room basically.
3
Q
Atomic number (Z)
A
Protons
4
Q
Mass number (A)
A
of protons + # of Neutrons
5
Q
Group 1
A
Alkali metals, not hydrogen
6
Q
Group 2
A
Alkaline earth metals
7
Q
Group 17
A
Halogens
8
Q
Group 18
A
Noble Gases
9
Q
Metals
A
Left and below stair step line
10
Q
Nonmetals
A
Right and above stair step line (and H)
11
Q
Metalloids
A
Many of the elements along the stair step line
12
Q
Transition metals
A
Groups 3-12
13
Q
Groups 1, 2, 13-18
A
Main group elements.
14
Q
Ionic Compounds
A
Combinations of metals and nonmetals
Held together by ionic bonds
Electrolytes
15
Q
Molecular Compounds
A
Combination of nonmetals
Held together by covalent bonds
Nonelectrolytes
