[Part 2]- C2- the periodic table 🧪

Question 1

What is a specific feature about group 7 elements?

Answer 1

• all group 7 elements, have seven electrons in their outer shell.

Question 2

Fill in the gaps: Group seven elements form _________, with two atoms which are joined by a ________ bond.

Answer 2

• Group seven elements form molecules, with two atoms which are joined by a covalent bond.

Question 3

What are group seven called?

Answer 3

• group seven are called the halogens.

Question 4

What happens to the melting and boiling points of group seven?

Answer 4

• the melting and boiling points of group seven increases as you move down the group.

Question 5

What happens to the relative molecular mass of group 7?

Answer 5

• as you move down group seven, the relative molecular mass increases. [the molecules get bigger]

Question 5

What happens to the relative molecular mass of group 7?

Answer 5

• as you move down group seven, the relative molecular mass increases.

Question 6

Fill in the gaps: The halogens are all ___ _______.

Answer 6

• The halogens are all non-metals.

Question 7

What do group seven elements form, when they react with other non-metal atoms ?

Hint: compound

Answer 7

• group seven elements form covalent compounds, when they react with other non-metal atoms.

Question 8

What happens when a group seven elements reacts with a metal?

Answer 8

• when group seven elements react with a metal, the group seven element: gains one electron and forms a negatively charged -1 ion.

Question 9

What happens to the reactivity of group seven ?

Hint: extra electron

Answer 9

• as you move down group seven, the reactivity of the halogens decreases
• This is because its harder to gain an extra electron, as there is a greater distance from the nucleus aswell as shielding by internal electrons.

Question 10

Fill in the gaps: A more _______ halogen, can _______ a less reactive halogen from an _______ solution of its salt.

Answer 10

Fill in the gaps: A more reactive halogen, can displace a less reactive halogen from an aqueous solution of its salt.

Question 11

Referring to relative atomic mass, what are the trends of group seven?

Answer 11

• group seven [the halogens] have a higher relative atomic mass.