metals, nonmetals, metalloids, transition metals (unit 3)

Question 1

alkali metals

Answer 1

highly reactive
group 1 (expect hydrogen)

Question 2

alkaline earth metals

Answer 2

group 2
reactive, but less than alkali metals

Question 3

transition metals

Answer 3

groups 3-12

Question 4

metalloids

Answer 4

B
Si
Ge, As
Sb, Te
Po

Question 5

halogens

Answer 5

group 17
highly reactive because they only have to gain one electron to become full

Question 6

noble gasses

Answer 6

group 18
not reactive because their outermost energy shell is completely full

Question 7

what is the relationship between valence electrons and group number?

Answer 7

the group number is the number of valence electron for group 1,2 and 13-18

Question 8

why are H and He separated from their groups?

Answer 8

He has two protons, so it could be next to H(1), but its outermost shell is full (2 e-), so it is a noble gas
H could be a halogen because it is highly reactive (has to gain one to become full), but it could gain or lose 1 to become stable