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year 9 Science Homework Week 6

Last updated over 4 years ago

15 questions

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Question 1

1.

Question 2

2.

Question 3

3.

Question 4

4.

Question 5

5.

Question 6

6.

Question 7

7.

Question 8

8.

Question 9

9.

Question 10

10.

Question 11

11.

Question 12

12.

Question 13

13.

Question 14

14.

Question 15

15.

What group on the periodic table are the alkali metals?

1

2

7

How does the atomic radius change going down the group?

decreases

stays the same

increases

Which alkali metal has the largest atomic radius?

lithium

caesium

francium

Which is the least reactive?

lithium

caesium

sodium

which is the least reactive

potassium

caesium

sodium

Which subatomic particle gives the nucleus a positive charge?

electron

neutron

proton

What is the force called that holds the outer electron near the nucleus?

Electrostatic gravity

Electrostatic attraction

Electrostatic repulsion

What are the group 7 elements called?

Alkali metals

Transition metals

Halogens

What is the most reactive halogen?

astatine

fluorine

chlorine

which is more reactive

bromine

iodine

chlorine

how many electrons are in the outer shell of a halogen?

1

7

8

How do halogens form an ion?

Gain 1 electron

Lose 1 electron

Gain 2 electrons

Which is true for the halogens moving up the group?

The electrostatic attraction becomes weaker

The electrostatic attraction becomes stronger

The electrostatic attraction remains the same

Which halogen is liquid at room temperature?

Chlorine

iodine

bromine

which halogen is purple

Chlorine

Iodine

Bromine