It increases by one to the right and decreases by one to the left, except transition elements
(first column always has 1 valence electron)
column refers to groups, so group 1 has 1 valence electron, group 2 has 2 valence electron and so on
Answer:
In order for people to survive, we need water. If we wanted to live on the moon, we would need water.
Water will not do much to stop the radiation; therefore, the amount of Uranium should be reduced to decrease the radioactivity.
A and 3
B and 6
C and 5
D and 1
E and 2
F and 4