chem 4 Flashcards
1
Q
periodic law
A
chemicals are arranged in increasing atomic #, characteristics repeat after certain periods
2
Q
group
A
vertical columns of PT
3
Q
periods
A
horizontal rows of PT
4
Q
transitions metals
A
large block in middle of table (groups 3-12)
5
Q
metals
A
all elements that lose electrons
6
Q
alkali metals
A
elements in group 1
7
Q
alkaline earth metals
A
all elements in group 2
8
Q
nonmetals
A
between metalloids and inert gasses
9
Q
halogen
A
group 17; highly reactive
10
Q
noble gas
A
group 18; nonreactive
11
Q
metalloid
A
diagonal; from boron to astatine
12
Q
ion
A
element that doesn’t have equal protons and electrons
13
Q
cation
A
positive charge ion
14
Q
anion
A
neg. charge ion
15
Q
ionization energy
A
energy required to remove outermost electron
