The periodic table

Question 1

What is group I and group II ?

Answer 1

‘S Block elements’ they are very reactive solids

Question 2

What is the middle block of the periodic table called?

Answer 2

The transition metals; typical metals. ;D Block elements.

Question 3

What are groups 3-8 called?

Answer 3

‘P Block elemant’

Question 4

What are the columns called?

Answer 4

Groups

Question 5

What are the rows called?

Answer 5

Periods

Question 6

How are the elements arranged?

Answer 6

In increasing atomic number

Question 7

Are the metals in group 1 reactive?

Answer 7

Yes very

Question 8

What do they all form when they react with air?

Answer 8

Corresponding metal oxides

Question 9

What does Lithium do when it reacts with water?

Answer 9

It floats, fizzes and moves about. It is exothermic reaction

Question 10

What does Sodium do when it reacts with water?

Answer 10

It floats, fizzes and moves about. It is exothermic reaction.

Question 11

What does Potassium do when it reacts with water?

Answer 11

It floats, fizzes and moves about. It is exothermic reaction and burns with a lilac flame.

Question 12

What do Rubidium and caesium do when they react with water?

Answer 12

They explode on contact

Question 13

Generally explain the characteristics of the metals in group one.

Answer 13

• They have low density ( first 3 less dense than water )
• React with non-metals to form ionic compounds in which the metal ion carries a charge of +1
• react with water, releasing hydrogen
• They form hydroxides that dissolve in water to give alkaline solution

Question 14

What are the characteristics of the transition metals?

Answer 14

• They have higher melting points (except for mercury)
• Have higher densities
• Are stronger and harder
• Much less reactive and so do not react as vigorously in water or oxygen

Question 15

What are the transition metal good as?

Answer 15

Catalysts

Question 16

What are the elements in group 7 known as?

Answer 16

The halogens

Question 17

What are some of the characteristics of the halogens?

Answer 17

• react with metals to form ionic compounds in which the halide ion carries a charge of -1
• the further down the group you go the less reactive the element is
• The further down you go the higher the melting point and boiling point are.

Question 18

A more reactive halogen can do what, to a less reactive one?

Answer 18

It can displace it from an aqueous solution of it’s salt.

Question 19

What are group 0 known as?

Answer 19

The noble gases

Question 20

Why are they un reactive?

Answer 20

Because they have a full outer shell and there is no need for them to gain or loos any electrons.

Question 21

How are the trends in the reactivity in groups in the periodic table be explained?

Answer 21

Because the higher the energy level of the outer electrons:
the more easily electrons are lost
the less easily electrons are gained.