periodic table Flashcards
1
Q
groups
A
column going down, 18 groups on periodic table
2
Q
periods
A
rows going across, 7 periods in periodic table
3
Q
trends down a group
A
the number of outer shell electrons is the same, the number of complete electron shells increases by one
4
Q
trends across a period
A
the number of shells electrons increases by one, the number of complete electron shells stays the same
5
Q
groups 1
A
alkali metals, very reactive, rarely found in nature
6
Q
group 18
A
noble gases
7
Q
group 2-13
A
transition metals, typical metals, high melting and boiling points
8
Q
group 17
A
halogens, very reactive non-metal, toxic and harmful
