Getting to know the periodic table

Question 1

The top row of the two rows outside the main periodic table

Accepted Answer

Rare Earth metals

Question 2

a horizontal row in the periodic table

Accepted Answer

period

Question 3

Inert gases in group 18

Accepted Answer

Noble

Question 4

A table that shows repeating patterns of the elements:

Accepted Answer

Periodic table

Question 5

Very reactive non metals in group 17

Accepted Answer

Halogens

Question 6

a vertical column in the periodic table

Accepted Answer

group

Question 7

What is at the top of the square

Accepted Answer

atomic number

Question 8

Elements in group 3-12 - less reactive than most metals

Accepted Answer

transition metals

Question 9

The radioactive elements from 89 to 103

Accepted Answer

Actinides

Question 10

Metals in group 2 - less reactive

Accepted Answer

Alkaline

Question 11

What is written with one or two letters in the square

Accepted Answer

elemental symbol

Question 12

metals in group 1 of the periodic table

Accepted Answer

Alkali metals

Question 13

What is at the bottom of the square

Accepted Answer

atomic mass

Question 14

Who designed the first periodic table?

Accepted Answer

Mendeleeve

Question 15

What is the word used for an element in the square

Accepted Answer

element name

Question 16

What do you call an element that has gained or lost neutrons

Accepted Answer

isotope

Question 17

What do you call an element that has gained or lost elctrons

Accepted Answer

ion

Question 18

a substance that cannot be broken down into simpler substances.

Accepted Answer

element

Questions 18