4.1.2🫧

Question 1

What are the elements of the periodic table arranged in?

Answer 1

In order of atomic number.

Question 2

What do groups show?

Answer 2

Elements with similar properties, that are in columns.

Question 3

What do elements in he same group have?

Answer 3

The same amount of electrons on the outer shells.

Question 4

How did john newland the periodic table?

Answer 4

He ordered his table in order of atomic weight.
He realised properties occurred every 8th element. 9octaves)

Question 5

How did Mendeleev arrange the periodic table?

Answer 5

He ordered the periodic table by order of atomic mass, but not always - in some places he changed the order based on atomic weights.

Question 6

What did Mendeleev do that no one else had done before?

Answer 6

He left gaps for elements that he thought had not been discovered before.
He also predicted the properties of future elements such as aluminium.

Question 7

What did the knowledge of isotopes explain?

Answer 7

It made it possible to explain why the order based on atomic weights was not always correct.

Question 8

What happened with the discoveries of the subatomic particles and the periodic table?

Answer 8

It allowed the periodic table to be ordered in atomic number, when this was done all elements were placed in the correct groups.

Question 9

What do metals react to form?

Answer 9

Positive ions (lose electrons)

Question 10

How many elements are metals?

Answer 10

Majority

Question 11

Where are the metals found on the periodic table?

Answer 11

Found too the left and towards the bottom of the periodic table.

Question 12

What do non metals form when they react?

Answer 12

They form negative ions.

Question 13

Where are non metals found on the periodic table?

Answer 13

Towards the right and top of the periodic table.

Question 14

What are the names of the group 1 metals?

Answer 14

Alkali metals

Question 15

What are the properties / characteristics of group 1?

Answer 15

Low density, soft, very reactive with oxygen and water.

Question 16

What is the trend in reactivity as you go down the group?

Answer 16

It increases

Question 17

What happens to melting and boiling point as you go down the group 1

Answer 17

Decreases

Question 18

Group 1 metal + water =

Answer 18

Metal hydroxide + hydrogen

Question 19

Group 1 metal + chlorine =

Answer 19

Metal chloride salt

Question 20

Group 1 metal + oxygen =

Answer 20

Metal oxide

Question 21

What are group 0 called?

Answer 21

Noble gases

Question 22

What are the properties of group 0 gases?

Answer 22

Unreactive as they are inert (stable arrangement, full outer shells), colourless gases, non flammable.

Question 23

What happens to boiling point as you go down group 0

Answer 23

It increases

Question 24

What are group 7 called?

Answer 24

Halogens

Question 25

What are the properties of group 7 elements

Answer 25

They are diatomic / exist in pairs.
7 electrons on the pouter shells.

Question 26

What happens to reactivity as you go down group 7?

Answer 26

It decreases

Question 27

What happens to melting and boiling points as you go down group 7?

Answer 27

They increase.

Question 28

What type of reactivity occurs in group 7?

Answer 28

Covalent bonds with non metals, ionic bonds with metals. More reactive elements displace less reactive elements, from an aqueous solution of its salt.

Question 29

What are the properties of the transition metals. (Compare to group 1)

Answer 29

Are harder and stronger, higher melting points and densities, much less reactive and don’t react as vigorously with oxygen and water.

Question 30

What are the typical properties of transition metals?

Answer 30

They form ions with different charges. Form brightly coloured compounds. Are useful as catalysts.