Element classes

Question 1

Three classes of elements:

Answer 1

Metals, nonmetals, metalloids

Question 2

How are elements arrange?

Answer 2

in order of increasing atomic number (# of p+) NOT MASS

Question 3

Elements w/ properties of both metals/ nonmetals are

Answer 3

metalloids or semi-conductors

Question 4

Properties of Metals:

Answer 4

• lose electrons
• good electrical conductors
• malleable, ductile
• low ionization energy
• low electronegativities

Question 5

Properties of nonmetals:

Answer 5

• gain e- (r reduced)
• not conductors
• dull brittle
• high ionization energy
• high electronegativities

Question 6

Periodic Family Groups:

Answer 6

Alkali Metals (Group 1)
Alkaline Earth Metals ( Group 2)
Transition Metals (groups 3-12)
+ Inner transition Metals ( f sublevel)
Noble Gases ( Group 18)
Halogens (group 17)

Question 7

(METALS) Alkali Metals - group 1

Answer 7

• all have one valence e-
• are NEVER found in pure form in nature (too reactive)
• reactivity INCREASES down the group
• most reactive group of metals
• soft
  -silvery in color

Question 8

(METALS) Alkaline Earth Metals- Group 2

Answer 8

• all have two valence e-
• less reactive than alkali metals
• not found in pure form in nature (too reactive)
• “Basic”

Question 9

(NONMETALS) Halogens - Group 17

Answer 9

• have 17 valence e-
• most reactive nonmetals
• ONLY found in pure form as a diatomic element

Question 10

(NONMETALS) Noble Gases- Group 18

Answer 10

• have 8 valence e- (except helium)
• chemically unreactive
• only found in pure form in nature
  -colorless and odorless