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Yr 10 Chemical Reactions Revision

Total questions: 29

Worksheet time: 15mins

Name
Class
Date
1.

Which of the following particles are used in determining the position of an element within the periodic table?

a)

protons only

b)

neutrons only

c)

electrons only

d)

protons and electrons

2.

The isotope 50-Vanadium has a mass number of 50. How many neutrons are present in this isotope?

a)

23

b)

27

c)

50

d)

73

3.

The atomic number of an element represents:

a)

  1. the number of electrons.

b)

  1. the number of protons.

c)

  1. the number of neutrons.

d)

  1. the number of protons added to number of electrons.

4.

  1. The nucleus of an atom consists of:

a)

  1. electrons and protons.

b)

  1. electrons and neutrons.

c)

  1. protons only.

d)

  1. protons and neutrons.

5.

  1. How many protons does a sodium atom have?

a)
10
b)
11
c)
5
d)
12
6.

  1. The atomic number of phosphorus is:

a)

  1. 15

b)

  1. 16

c)

  1. 31

d)

  1. 30

7.

  1. The charge of an electron is:

a)

  1. Negative.

b)

  1. Neutral.

c)

  1. Positive.

d)

  1. Nothing.

8.

  1. Which of the following are atoms of the same element?


a)

  1. U and Y

b)

  1. U and X

c)

  1. X and Y

d)

  1. U and V

9.

Which of the following would not increase the rate of a chemical reaction?

a)

decrease in temperature

b)
increase in concentration of reactants
c)
increase in pressure
d)
presence of a catalyst
10.

What is the formula for dibromine tetriodide?

a)
Br2I4
b)
BrI2
c)
BrI4
d)
Br2I2
11.

What is the formula for dinitrogen pentoxide?

a)
NO2
b)
N2O3
c)
N2O4
d)
N2O5
12.

What is the name of the compound with formula N2O ?

a)
nitric oxide
b)
nitrogen dioxide
c)
nitrogen monoxide
d)

dinitrogen monoxide

13.

What is the formula for the compound copper (II) chloride?

a)
CuCl3
b)
CuCl2
c)
Cu2Cl
d)
CuCl
14.

What is the formula of the compound lithium hydroxide?

a)
LiHO
b)
LiOH2
c)
Li2OH
d)
LiOH
15.

What is the name of the compound with the formula NaI?

a)
sodium chloride
b)
sodium bromide
c)
sodium iodide
d)
sodium fluoride
16.

What is the name of the compound with the formula K2O?

a)

potassium chloride

b)

potassium bromide

c)

potassium iodide

d)

potassium oxide

17.

What is the name of the compound with the formula KCl?

a)

potassium chloride

b)

potassium bromide

c)

potassium iodide

d)

potassium fluoride

18.

What is the formula for the compound iron (III) oxide?

a)

Fe2O3

b)

FeO

c)

Fe3O4

d)

FeO2

19.

  1. What is the atomic number of oxygen?

a)

  1. 6

b)

  1. 8

c)

  1. 16

d)

  1. 18

20.

What is the atomic number of the element with 7 protons?

a)

5

b)

7

c)

9

d)

11

21.

What is the formula of the compound sodium chloride?

a)

NaCl

b)

Na2Cl

c)

NaCl2

d)

Na2Cl2

22.

The atomic symbol for a gold atom is 19779 Au. What does this tells you about the gold atom?

a)

  1. It contains 118 protons.

b)

  1. It contains a total of 197 protons, neutrons and electrons.

c)

  1. It contains 118 neutrons.

d)

  1. It contains 197 electrons.

23.

Identify which of the following will cause an atom to become a negative ion (i.e. an anion).

a)

gain electrons

b)

  1. lose protons

c)

  1. gain neutrons

d)

  1. lose neutrons

24.

Sodium is an example of:

a)

  1. a metal

b)

  1. an alloy

c)

  1. a non-metal

d)

  1. a metalloid

25.

Carbon is an example of:

a)

  1. a metal

b)

  1. an alloy

c)

  1. a non-metal

d)

  1. a metalloid

26.

An element that belongs to period 5 of the periodic table is:

a)

  1. carbon.

b)

  1. strontium.

c)

  1. scandium.

d)

  1. chromium.

27.

An atom of the element magnesium contains 12 electrons. The arrangement of its electrons in shells can be written as:

a)

  1. 2, 4, 6

b)

  1. 2, 2, 2, 2, 2, 2

c)

  1. 2, 2, 8

d)

  1. 2, 8, 2

28.

The bromine atom gains an electron to form the bromide ion Br–. How many electrons does the bromine atom have in its outer shell before it becomes ionised?

a)
1
b)
3
c)
5
d)
7
e)

9

29.

Which of the following is not an ionic compound?

a)

  1. NaCl

b)

  1. CaCl2

c)

  1. CO2

d)

  1. AgNO3

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