periodic table review

Question 1

what are element symbols used for

Answer 1

to represent the names of different elements

Question 2

what are the horizontal rows called

Answer 2

periods

Question 3

what are the vertical rows called

Answer 3

groups

Question 4

how many periods are there

Answer 4

7

Question 5

how many groups are there

Answer 5

18

Question 6

where are metals found

Answer 6

metals are found in the left side of the periodic table

Question 7

where are metalloids found

Answer 7

metalloids are found in a staircase patters to the right between metals and non-metals

Question 8

what is group 1 known as

Answer 8

alkali metals (have low melting points, are soft and very reactive.)

Question 9

what is group 2 known as

Answer 9

alkaline earth metals (are relatively soft and reactive.)

Question 10

what are group 3-13 known as

Answer 10

transition metals(Many can form coloured compounds and some are magnetic. The only metals not silver in colour are copper (Cu) and gold (Au).)

Question 11

where does metals get more reactive

Answer 11

Metals become more reactive moving down a group and to the left of the periodic table.

Question 12

facts about non-metals

Answer 12

18 non-metals
makes most of the earths crust and atmosphere and all living organisms

Question 13

what is group 17 known as

Answer 13

halogens

Question 14

what is group 18 known as

Answer 14

noble gases (not reactive, since full valence shell)

Question 15

facts about metalloids

Answer 15

a small boundary between metals and non-metals
has metals and non-metals features