Chapter 2

Question 1

Dalton’s Periodic table

Answer 1

Used atomic weights
Did not take undiscovered elements into account

Question 2

Newlands’ Periodic table

Answer 2

Used atomic mass
Law of Octaves: every eighth element had similar properties
Did not take undiscovered elements into account

Question 3

Mendleev’s Periodic table

Answer 3

Used atomic weight
Arranged so that there were similar properties
Correctly predicted undiscovered elements properties
Changed order of some elements so that elements with the same properties remained in the same group

Question 4

Solid metal properties

Answer 4

Ductile (can be drawn out into wires)
Malleable (can be hammered into shapes without smashing

Question 5

Solid non-metal properties

Answer 5

Brittle

Question 6

Group 0

Answer 6

Noble gases
Unreactive (full outer shell)
Monatomic (single atom gases, not like oxygen, which is diatomic)
Boiling points of noble gases get higher as you go down the group