4.1-4.4 Periodic Table Of Elements

Question 1

of naturally occurring elements

Answer 1

90

Question 2

How many elements are artificially created?

Answer 2

28

Question 3

Most abundant element in earth’s crust

Answer 3

Oxygen

Question 4

How many elements are there in the periodic table?

Answer 4

118

Question 5

Importance of valence electrons

Answer 5

Chemists study the transfer of sharing of electron

Question 6

4 properties of metals

Answer 6

Good conductors of heat and electricity, ductile(thin wires), malleable(thin sheets)

Question 7

Properties of non metals

Answer 7

Poor conductors of heat and electricity
Not ductile or malleable
Gas
Dull

Question 8

Properties of metalloids

Answer 8

Solids, can be shiny or dull
Conduct heat and electricity better than non metals but not better than metals
Ductile and malleable

Question 9

Groups are the ________ on the periodic table

Answer 9

Columns

Question 10

Groups AKA

Answer 10

Families

Question 11

Periods are

Answer 11

Rows

Question 12

All elements have the same # of

Answer 12

Valence electrons

Question 13

1 exception of hydrogen

Answer 13

Alkali metals

Question 14

Group 1 elements

Answer 14

Single valence electrons

Most reactive metals

Question 15

Group 2 elements

Answer 15

Alkali earth metals

Question 16

Group 2 elements have____ valence electrons

Answer 16

2

Question 17

Group 17 or VIIA

Answer 17

Halogens

Question 18

Halogens react with __________ to form salts

Answer 18

Alkali metals

Question 19

Group that contains the most unreactive elements on the periodic table

Answer 19

Noble gases

Question 20

Rare earth elements

Answer 20

Lanthanide and actinide

Question 21

Dmitri Mendeleev, arranged periodic table according to

Answer 21

Atomic mass

Question 22

Henry Moseley

Answer 22

Rearranged periodic table according to elements opposed to atomic mass of Mandeleev’s table