Chapter 3.2 Notes

Question 1

How many electrons are considered a full set

Answer 1

8

Question 2

How do u determine the number of balance electrons for group numbers 1-2

Answer 2

The group number= number of valence electrons

Question 3

How do u determine the number of balance electrons for group numbers 13-18

Answer 3

The second number(ex: group 15 has 5 valence electrons)

Question 4

How do u determine the number of balance electrons for group numbers 2-12

Answer 4

Rebels; they don’t follow a general rule

Question 5

How many electrons do the the 1st,2nd, and 3rd levels hold

Answer 5

1st: 2
2nd: 8
3rd: 18

Question 6

Where do u look when determine the number of valence electrons

Answer 6

Group

Question 7

Where do u look when determining the number of energy levels

Answer 7

Period

Question 8

All elements on a period have the same number of

Answer 8

Rings

Question 9

Why does helium, with only 2 valence electrons grouped with noble gases

Answer 9

It’s outermost she’ll is completely full making it nonreactive

Question 10

Are group one and two very reactive

Answer 10

Yesssss!!!!

Question 11

Group 1:Alkali metals

Answer 11

Soft-can be cut with knife, very low density

Question 12

Alkali metal+water=

Answer 12

Hydrogen gas

Question 13

Group 2: Alkaline-earth metals

Answer 13

Not as reactive as group 1 metals, more stable

Question 14

Group 3-12: transition metals

Answer 14

Less likely to lose valence electrons, more stable elements

Question 15

Lanthanides

Answer 15

Shiny, reactive, used in steel making

Question 16

Actinides

Answer 16

Unstable and radioactive

Elements after 94 aren’t found in nature

Question 17

Group 13-16 are

Answer 17

Metalloids

Question 18

Group 13: boron

Answer 18

Aluminum

Question 19

Group 14:carbon group

Answer 19

Nonmetals, metalloids

Question 20

Group 15: nitrogen group

Answer 20

Gas at room temperature, 78% of the air in our atmosphere

Question 21

Group 16: oxygen group

Answer 21

Very reactive, 21% of our air, necessary for burning to take place

Question 22

Group 17-18 are

Answer 22

Nonmetals

Question 23

Group 17:Halogens

Answer 23

Very reactive, never found uncombined

Question 24

Group 18: noble gases

Answer 24

Unreactive nonmetals cause they have a full set of 8 valence electrons

Question 25

Atomic mass

Answer 25

Average of isotopes( decimals)

Question 26

Isotope

Answer 26

Element with different number of neutrons. Different mass cause u change the number of neutrons

Question 27

Ion

Answer 27

Atom with a charge( change electrons)

Question 28

Group

Answer 28

Up and down( tell us the number of valence electrons and properties)

Question 29

Period

Answer 29

Side to side (valence electrons are: what ring. Ex: 5th period, on 5th ring)