SYDNEY PAGON STEM ACADEMY
Science Department
Chemistry
Grade 8: H / I
END OF YEAR EXAMINATION 2023
Duration: 2 Hours
Teachers: Ms. C. Bayliss & Mr. G. Griffiths
Name: __________________________
Date : June _____2023
Class: ___________________________
READ ALL INSTRUCTIONS CAREFULLY
This paper consists of TWO (2) sections: Section A, has 30 Multiple choice questions
and Section B structured questions . Answer all questions in all sections to ensure
maximum marks.
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SECTION A- MULTIPLE-CHOICE QUESTIONS
Instruction: Circle the letter (A, B, C or D) which corresponds with the correct
answer.
(30 marks)
1) The modern periodic table of elements is arranged by:
A. Atomic mass
B. Atomic number
C. Symbols
D. Relative molecular mass
2) A group of elements has no luster, has no conductivity, and are brittle. What is the
classification of these elements?
(a) Metalloid
(b) Metals
(c) Non-metals
(d) None of the above
3) Which of these is NOT a physical property used to classify metals, nonmetals and
metalloid?
(a)
Conductivity
(b)
Malleability
(c)
Luster
(d) Texture
4) The element sulfur (S) is grouped in the Periodic Table with the nonmetals.
Based on this, what do you know about sulfur?
(a) It has a shiny surface
(b) Its soft and malleable
(c) It can be pulled into thin wires
(d) It’s a poor conductor of electricity
5) What is the study of the composition, structure, and properties of matter?
A. Biology
B. Physics
C. Chemistry
D. Geology
6) Where on the Periodic Table are the metalloids found?
(a)
(b)
(c)
(d)
On the right
Along the stair step of the periodic table
In the middle
Along the bottom
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7) What are the physical properties used to classify metals, nonmetals, and metalloid?
(a) Reactivity, smell and density
(b) Luster, conductivity and malleability
(c) Physical state, hardness and mass
(d) Explosive, corrosive and reactive
8) A certain element, when pounded with a hammer, doesn't break apart but forms
thin sheets. It also conducts electricity very well. The element is most likely a:
(a) Metal
(b) Metalloid
(c) None of the above
(d) Non-metal
9) Which group of elements has, in general, higher melting and boiling points?
(a) Metals
(b) Non-metals
(c) Metalloid
(d) None of the above
10) What would be a good element to make an electrical wire out of?
(a) Carbon, because it is solid at room temperature
(b) Hydrogen, because it is a non-metal and conducts electricity well
(c) Copper, because it is a metal and conducts electricity well
(d) Plastic, because it conducts electricity well.
11) Beryllium is in group number______.
A. 2
B. 3
C. 4
D. 7
12) There are only a few non-metals that conduct electricity, such as:
(a) Carbon
(b) Nitrogen
(c) Argon
(d) None of the above
13) What would be the best way to determine if an element is malleable or not?
(a) See if it sink or floats
(b) Shine a light on it
(c) Try to hammer it flat
(d) See if it conducts electricity
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14) Horizontal rows on the periodic table are called:
A. Periods
B. Groups
C. Columns
D. Families
15) If a group of elements are shiny, malleable, and good conductors of electricity,
What is the classification of these elements?
(a) Metalloid
(b) Nonmetals
(c) None of the above
(d) Metals
16) To make observations you use your _______.
A. Experience
B. Senses
C. Smile
D. Hands
17) Which of the following properties describes a metal?
(a) Semi-conductors
(b) Malleable and ductile
(c) Solid, liquid or gas at room temperature
(d) Dull and brittle
18) ________ are dull, brittle and poor conductors
(a) Metalloid
(b) Metals
(c) Non-metals
(d) All of the above
19) Metals are best known for having which of the following properties?
(a) Semi-conductors
(b) Good conductors
(c) Dense
(d) Elements
20) Which of the following is an example of a non-metal?
(a) Sodium
(b) Carbon
(c) Boron
(d) Aluminium
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21) A substance that is made up of only one type of atom is called_____.
a) a nucleus
b) an element
c) a compound
d) a sub-atomic particle
22) Which of the following statement is TRUE?
(a) Metals are generally on the right side of the periodic table
(b) Metalloid are generally on the left side of the periodic table
(c) Non-metals are generally on the right side of the periodic table
(d) Non-metals are generally on the stair-step line of the periodic table
23) A student tests an object. It is shiny, bends easily, and conducts electricity.The object
is a ________.
(a) Metalloid
(b) Metal
(c) Plastic
(d) Nonmetal
24) What is the charge of an electron?
A. 1−
B. 1+
C. 2+
D. 0
25. What is represented in the periodic table by the symbol Al?
a. Alum
b. Albumen
c. Alloy
d. Aluminium
26. Which of the following elements is a non-metal?
a. Sodium
b. Aluminium
c. Oxygen
d. Calcium
27. When hydrogen combines with oxygen water is made. The reactant(s) in this process
is/are:
a. Hydrogen and water
b. Oxygen and water
c. Hydrogen and oxygen
d. Hydrogen only
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28. Which of the following elements does not form a cation?
a. Hydrogen
b. Chlorine
c. Sodium
d. Copper
29. What is the mass of an electron?
a. 1
b. 1840
c. 0
d. 1/1840
30. A Chemist is best described as;
a.
b.
c.
d.
A scientist that studies all forms of matter
A scientist that studies chemical reactions
A scientist that studies the states of matter
A scientist that studies dangerous chemicals
SECTION B- SHORT ANSWER QUESTIONS
Answer all questions in this section.
(Total 16 marks)
QUESTION 1
A. Define the term Ion:
(2 marks).
________________________________________________________________________
_______________________________________________________________________
B. Give an example of the following:
(1 mark).
i)Cation:
________________________________________________________________________
ii)Anion:
(1 mark).
_______________________________________________________________________
C. Match the following descriptions in Column A with the correct answer in Column B .
(10 Marks)
COLUMN A
COLUMN B
A. Dull coloured objects
___. Periods
B. Discovered the Periodic Table
___. Mixtures
C. Gaseous elements
___. Electrons
D. Good conductors of heat
___. Dmitri Mendeleev
E. Forms the nucleolus of an atom
___. Protons
F. Forms the outer band of an atom
___. Elements
G. Substance composed of a single atom
___. Families
6
)
H. Two elements mixed together
___. Carbon
I. Horizontal row of the periodic table
___. Non-metals
J. The vertical rows of the periodic table
___. Metal
QUESTION 2
i) Complete the drawing of the atoms below by drawing the electrons in their correct
places and writing the electronic configuration for each atom. Use only the necessary
shells in the diagram.
(18mrks)
N.B. The grey area of each diagram represents the nucleus.
Electronic Configuration:
Electronic Configuration:
Electronic Configuration:
Electronic Configuration:
Electronic Configuration:
Electronic Configuration:
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ii) Complete the table below by placing the symbols and number of protons, neutron
and electrons each element has.
NAME OF
SYMBOL
(10 marks)
PROTON
NEUTRON
ELEMENT
H
Sodium
Boron
K
S
PERIODIC TABLE OF ELEMENTS
END OF EXAMINATION
Total Marks = 72 Marks
Have a Happy Holidays
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ELECTRON