The Periodic Table

Question 1

Mass of an electron

Answer 1

1/1836

Question 2

Atomic number

Answer 2

The number of protons

Question 3

Atomic mass

Answer 3

The number of protons and neutrons

Question 4

Describe an isotope

Answer 4

Atoms of the same element with the same atomic number but different atomic mass

Question 5

How is the periodic table arranged?

Answer 5

By increasing atomic number

Question 6

What are Groups

Answer 6

Columns

Question 7

What are Periods

Answer 7

Rows

Question 8

Elements in the same Group have…

Answer 8

The same number of electrons in the outer shell

Question 9

Elements in the same Period have…

Answer 9

The same number of electron shells

Question 10

Inert

Answer 10

Unreactive

Question 11

Which Group has inert elements and why?

Answer 11

Group 0/8 because the outer shell of electrons are full

Question 12

Properties of Group 1 (Alkali metals) elements

Answer 12

Dull on oxidation. Highly reactive – reactivity increases down the Group. Low melting and boiling points.

Question 13

Alkali metals when reacting with water

Answer 13

Fizzing, move around quickly, float on the surface. Potassium sets on fire with lilac flame.
2Li + H2O -> 2LiHO + H2
Lithium + Water -> Lithium hydroxide + hydrogen

Question 14

What are Group 7 elements called?

Answer 14

The halogens

Question 15

What are halogens?

Answer 15

Diatomic atoms

Question 16

What are the diatomic atoms?

Answer 16

HOBrFINCl
Hydrogen
Oxygen
Bromine
Fluorine
Iodine
Nitrogen
Chlorine

Question 17

How does the state and colour change down the halogens Group?

Answer 17

Down the group the states change from gas to solid (F - gas, Cl - gas, Br - liquid, I - solid) and colour gets darker (F - pale yellow, Cl - green, Br - orange/brown, I - dark purple/black)

Question 18

How does reactivity change in the halogens Group?

Answer 18

Reactivity decreases down the group

Question 19

What is a displacement reaction?

Answer 19

A chemical reaction where a more reactive element replaces a less reactive element.

Question 20

Displacement equation

Answer 20

Potassium bromide + chlorine -> Potassium chloride + bromine

2KBr + Cl2 -> 2KCl + Br2

Question 21

What is produced when halogens react with hydrogen

Answer 21

Hydrogen halides which are poisonous gases, soluble in water, react with water to form a solution of acids e.g hydrochloric acid

Question 22

What is produced when halogens react with alkali metals

Answer 22

Salts e.g sodium chloride