Chem: Key Vocabulary Unit 3 Flashcards
1
Q
Periodic Table
A
the table of chemical elements arranged in order of atomic number, usually in columns and rows
2
Q
Atomic Radius
A
The measure from the center of the nucleus to the edge, or half the distance between 2 identical atoms bonded together.
3
Q
Electronegativity
A
how strongly an atom pulls on electrons
4
Q
Ionization Energy
A
How hard it is to remove an electron from an atom
5
Q
Atomic Radius trend:
A
R - L / T - B
6
Q
Ionization Energy:
A
L- R / T - B
7
Q
Electronegativity trend:
A
L - R / T - B
8
Q
Periods
A
rows - same electron shells
9
Q
Group
A
columns - similar chemical properties
10
Q
metals
A
left
11
Q
nonmetals
A
right
12
Q
metalloids / semimetals
A
staircase (Si, ge, As, Sb, Te, Po, At, Ts)
13
Q
Diatomic
A
2 atoms
There are 7 diatomic atoms:
(N, O, F, Cl, Br, I, HYDROGEN)
14
Q
Noble gases
A
8 ve- row
15
Q
halogens
A
first 4 7ve-
