Chem GCSE periodic table

Question 1

Why did Newlands table not work?

Answer 1

*mixed up metals and non metals
*left no gaps for undiscovered elements
*pattern only worked for 20 elements

Question 2

How did Newlands arrange the periodic table?

Answer 2

In order of increasing atomic weight

Question 3

What did Newlands name his rule

Answer 3

The octave rule

Question 4

How are atoms arranged

Answer 4

In order of their atomic number

Question 5

What are atoms arranged in

Answer 5

In groups (columns) due to similar properties

Question 6

How did Mendeleev arrange his periodic table

Answer 6

Elements are in groups in order of their atomic weight

Question 7

What are isotopes

Answer 7

Are atoms with the same number of protons but different number of neutrons

Question 8

How is the modern periodic table arranged

Answer 8

*in order of increasing atomic number
*elements in the same group have the same number of electrons in their highest energy level

Question 9

Properties of metals

Answer 9

Good conductors of heat & electricity, ductile, high melting points

Question 10

Properties of non metals

Answer 10

Poor conductors of heat & electricity, often liquids and gasses

Question 11

Chemical properties of metal

Answer 11

Have metallic bonding, form ionic compounds by loosing electrons

Question 12

Chemical properties of non metals

Answer 12

Are covalent molecules and form ionic compounds by gaining electrons, they form covalent compounds by (with non metals) sharing a pair of electrons

Question 13

Alkali metals

Answer 13

Have one electron in their highest energy level, have a low density

Question 14

What is the melting and boiling point like in group 1

Answer 14

Melting and boiling point decreases going down

Question 15

Reactivity in group 1

Answer 15

Reactivity increases going down group 1

Question 16

The halogens

Answer 16

Have 7 electrons in their highest energy level, coloured vapour and react with metals to form salts

Question 17

Melting and boiling point in group 7

Answer 17

Melting and boiling point increases going down

Question 18

Reactivity in group 7

Answer 18

Reactivity decreases going down

Question 19

Nobel gasses

Answer 19

Very unreactive as they have a full highest energy level, 8 electrons in highest energy level

Question 20

Boiling point in group 8

Answer 20

Boiling point increases going down the group

Question 21

Properties of transition metals

Answer 21

Good conductors of electricity & heat, can easily be hammered into shape

Question 22

Melting point of transition elements

Answer 22

Higher melting point compared to the alkali metals

Question 23

Compared to the alkali metals, transition elements:

Answer 23

Have higher densities, harder and stronger, less reactive

Question 24

Transition metals: coloured compounds

Answer 24

Cu2+ = blue
Fe2+ = pale green
Ni2+ = green

Question 25

Reactivity of transition metals:

Answer 25

They react slowly with oxygen to form ionic salts, don’t react with cold water