Chp. 4 Periodic Table

Question 1

What is the periodic table?

Answer 1

The organisation of all known elements

Question 2

How many known elements are there?

Answer 2

There are 100 known elements

Question 3

Who grouped and ordered the table?

Answer 3

Dmitri Mendeleev

Question 4

What did Dmitri have in his table?

Answer 4

Gaps were there
Noble gases aren’t present
Ordered from atomic mass
No transition metals,actinides or lanthanides

Question 5

What is an element?

Answer 5

A substance containing only 1 type of atom

Question 6

What are the characteristics of metals?

Answer 6

•Malleable
•Ductile
•Sonorous
•conductors of heat and electricity

Question 7

What are periods?

Answer 7

Horizontal rows in the periodic table

Question 8

What are groups?

Answer 8

Vertical columns in the periodic table

Question 9

What is group 1 called?

Answer 9

Alkali metals
Reactive metals

Question 10

What is group 2 called?

Answer 10

Alkaline earth metals
Reactive metals

Question 11

What is group 7 called?

Answer 11

Halogens
Reactive non-metals

Question 12

What is group 0 called?

Answer 12

Noble gases
Unreactive non-metals

Question 13

What are the characteristics of alkali metal?

Answer 13

•soft
•lustrous inside but will tarnish quickly when exposed to air
•less dense, will float on water
•become more reactive and lower melting points down the list

Question 14

Alkali metal+water=?

Answer 14

Metal Hydroxide+hydrogen

Question 15

What is group 3 called?

Answer 15

Transition metals
Unreactive metals