C2

Question 1

What are chemical elements placed in, in the periodic table?

Answer 1

The atomic number(protons)

Question 2

Why do elements in the same group react in similar ways?

Answer 2

They have the same number of electrons on their outermost shell

Question 3

How do you know the number of electrons on the outermost shell?

Answer 3

Look at the group it is in, elements in group 2 will have 2 electrons, elements in group 6 will have 6 electrons on the outermost shell

Question 4

What is the main difference of metals and non metals?

Answer 4

Metals conduct electricity

Non-metals are electrical insulators (doesn’t easily transmit energy)

Question 5

Where are non metals found in the periodic table?

Answer 5

Top right hand corner

Question 6

What groups form negative ions ?

Answer 6

Group 5 (gain 3 electrons)
Group 6 (gain 2 electrons)
Group 7 (gain 1 electron)

They then have the electronic structure of the noble gas at the end of their period.

Question 7

Why are noble gases very stable?

Answer 7

They have a full outermost shell of electrons.

Question 8

Gove me an example of a pattern of the noble gasses?

Answer 8

Boing points increase as you go down the row

Question 9

What determines an elements properties?

Answer 9

The number of electrons in the outermost shell.

Question 10

Why are noble gases so stable?

Answer 10

They have very stable electron arrangements

Question 11

The atoms of metals tend to ______ electrons

Answer 11

Lose

Question 12

The atoms of non-metals tend to______ gain electrons.

Answer 12

Gain

Question 13

The group number in the periodic table=

Answer 13

Number if electrons in the outermost shell.

Question 14

Non metals are______

Answer 14

Electrical insulators

Question 15

Metals are ________

Answer 15

Conductors

Question 16

How reactive are the alkali metals?

Answer 16

Very reactive

Question 17

What happens to the reactivity of group 1 (alkai metals) as you go down the group and why?

Answer 17

-the reactivity increases as you go down the group because

as the atoms electronic strucutres get larger the elecrostatic forces of attraction with the nucleus gets weaker because the distance between the outer electron and nucleus increases(electrons shielding effect).

As you go down the group, the positive charge is greater becasue there is more protons in the nucleus

Question 18

What happens to the reactivity of group 7(halogens) as you go down the group and why?

Answer 18

Reactivity decreases as you go down the group.

Going down the group the nucleus has a less attractive force because there are more shells of electrons, it is therefore harder to attract incoming electrons making it more reactive

Question 19

Halogens are _________ ________ of heat and elecricity

Answer 19

Poor conductors

Question 20

Group 1 form ______ ions

Answer 20

Positive 1+

Question 21

Group 7 form ________ ions

Answer 21

Negative 1-