Properties Of Metals In Each Group

Question 1

In which group is the most reactive metal found

Answer 1

Group 1

Question 2

What is the name of the metals in group 1

Answer 2

Alkali metals

Question 3

Why are alkali metals so reactive?

Answer 3

They have one outer electron, which is easily lost to form a +1 ion.

Question 4

Which metals are the most reactive ?

Answer 4

Alkali metals (in grop 1)

Question 5

What do alkali metals react with?

Answer 5

Alkali metals react with water, oxygen, chlorine, and other nonmetals

Question 6

What do alkali metals produce after reacting vigorously with water?

Answer 6

Alkali metals react vigorously with water to produce hydrogen gas and metal hydroxide

Question 7

Where are alkali metals stored in? And why?

Answer 7

Alkali metals should be stored under mineral oil or kerosene to prevent them from reacting with air and water,

Question 8

Properties Of group 1(alkali metals)

Answer 8

All the alkali metals have very low density compared with other metals.

They are very shiny and soft. They van be cut with a knife.They have very silvery,shiny surface when u first cut them. However,this quickly goes dull as metals react with oxygen in the air

Alkali metals are highly reactive.

alkali metals melting and boiling point decreases as u go down the group.

Question 9

What do alkali metals form when they react with water?

Answer 9

The metals react with water to produce hydrogen and an alkaline solution containing the metal hydroxide

Question 11

Which metals in group 1 have the the highest boiling and melting point?

Answer 11

Lithium

Question 12

Which metals in group 1have the lowest melting and boiling point?

Answer 12

Caesium (Fr)

Question 13

When does the the reactivity increase in group 1 ?

Answer 13

The reactivity increases as u go down the group 1

Question 14

What happens to reactivity as you go down Group 1?

Answer 14

Reactivity increases because the outer electron is further from the nucleus and easier to lose.

Question 15

What happens when an alkali metal reacts with water?

Answer 15

It forms metal hydroxide + hydrogen gas.
e.g
2Na+2H2O→2NaOH+H2

​

Question 16

What colour flame does potassium burn with?

Answer 16

✅ Lilac flame 🔥

Question 17

What type of solution is formed when alkali metals react with water?

Answer 17

Alkaline solution (pH > 7)

Question 18

What gas is produced when alkali metals react with water?

Answer 18

Hydrogen gas (H₂) (it makes a pop sound in a flame)

Question 19

What is the word equation for sodium reacting with chlorine?

Answer 19

Sodium + Chlorine → Sodium chloride

Question 20

Why do alkali metals tarnish in air?

Answer 20

They react with oxygen, forming a metal oxide layer.

Question 21

❓ What happens to melting points as you go down Group 1?

Answer 21

Melting points decrease (they get softer).

Question 22

What are three properties of alkali metals?

Answer 22

1. Soft, 2. Low density, 3. Highly reactive

Question 23

Why is cesium the most reactive alkali metal?

Answer 23

It has the largest atomic radius, so its outer electron is very easy to lose. And they have weak intermolecular forces

Question 24

What type of compound is formed when alkali metals react with halogens?

Answer 24

Ionic salts (e.g., sodium + chlorine → sodium chloride).

Question 24

Why must alkali metals be stored in oil?

Answer 24

To prevent reactions with air (oxygen) or water.

Question 25

What happens to reactivity as you go down Group 7?

Answer 25

Reactivity decreases because atoms find it harder to gain an electron.

Question 26

What do halogens react with to form salts?

Answer 26

Metals (e.g., sodium + chlorine → sodium chloride)

Question 27

What is the state of fluorine, chlorine, bromine, and iodine at room temp?

Answer 27

Fluorine = gas Chlorine = gas Bromine = liquid Iodine = solid.

Question 28

What happens when a more reactive halogen reacts with a less reactive halide compound?

Answer 28

Displacement reaction occurs. e.g Cl2+2Kbr→2KCl+Br2 ​ ​ ​

Question 29

Why are noble gases unreactive?

Answer 29

They have full outer electron shells.

Question 30

Describe fluorine

Answer 30

Fluorine is a poisonous yellow gas and its very reactive

Question 31

Describe Chlorine

Answer 31

Chlorine is less reactive than fluorine and its a poisonous green gas

Question 32

Describe Bromine

Answer 32

poisonous red liquid

Question 33

Describe iodine

Answer 33

Iodine is a dark grey solid that can form poisonous purple vapours but they are also antiseptic.

Question 34

what do halogens exist as?

Answer 34

Halogens exist as diatomic atoms

Question 34

What are diatomic atoms?

Answer 34

2 atom molecules

Question 35

what happens in group 7 halogens when u go down the group?

Answer 35

Melting point and boiling point increases but reactivity decreases

Question 36

why in group 7 as u go down the down the group the reactivity decreases?

Answer 36

because the outermost shell gets further waway from the nucleus

Question 37

what happens if a halogen cant attract an electron to complete its outer shell?

Answer 37

It cant react. therefore Iodine is the least reactive

Question 38

what do we call when halogens gains an electron to form 1- ion

Answer 38

Halide. e.g fluoride, chloride, bromide, iodide

Question 39

More reactive halogens will always do what?

Answer 39

More reactive halogens will always displace the most reactive halogens. e.g fluorine chlorine or bromine could all displace iodine

Question 40

Noble gases exist as what?

Answer 40

Noble gases exist as colourless gases

Question 40

Noble gases are INERT. What does this mean?

Answer 40

INERT means that they dont really react with anyhting

Question 41

How many electrons does the outer shell of noble gases have?

Answer 41

8 electrons. they have full outer shells

Question 42

If noble gases dont react with anythting, what do they exist as?

Answer 42

If noble gases don't react with anything, they exist as single atoms

Question 43

Why cant noble gases be set on fire?

Answer 43

Noble gases cant be set on fire because they are non flammable

Question 44

Properties of group 8 (noble gases)

Answer 44

As you go down group 8 their boiling point increases