atomic theory Flashcards
1
Q
groups
A
vertical lines in the periodic table
2
Q
periods
A
horizontal lines in the periodic table
3
Q
alkali metals
A
highly reactive metals in the first group, excluding H
4
Q
halogens
A
highly reactive non metals in group 17
5
Q
noble gasses
A
unreactive elements in group 18
6
Q
metalloids
A
have properties of both metals and non metals.
7
Q
metals
A
to the right of metalloids
8
Q
non metals
A
all elements to the left of metalloids (except H)
