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CHEMISTRY EXIT 2021

Total questions: 60

Worksheet time: 54mins

Name
Class
Date
1.
anions are _____ ions.
a)
positive
b)
negative
c)
neutral
2.
what charge will an aluminum ion have?
a)
3+
b)
2+
c)
2-
d)
3-
3.
What charge will a nitride ion have?
a)
3+
b)
2+
c)
2-
d)
3-
4.
How many valence electrons does Lithium have?
a)
1
b)
2
c)
3
d)
4
5.
How many valence electrons does magnesium have?
a)
1
b)
2
c)
12
d)
24
6.
What is the volume of Object X?
a)
10.0 cm3
b)
15.0 cm3
c)
20.0 cm3
d)
25.0 cm3
7.
What is measured with a graduated cylinder?
a)
Passage of time
b)
Distance from one thing to another
c)
Weight of an object
d)
Volume of liquid
8.

Which of the following statements about elements and compounds is accurate?

a)

Elements are many different types of atoms together but compounds are just one type of atom.

b)

Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically.

c)

Elements are not found on the Periodic Table but compounds are found on the Periodic Table.

d)

Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically.

9.

Which of the following could be the chemical formula for a compound?

a)

Na

b)

CO2

c)

H2 + O2

d)

Au

10.

Which of the following could be the chemical formula for an element?

a)

Si2

b)

H2O

c)

C + O2

d)

C6H12O6

11.

Which of the following statements is true regarding the atomic number of an element?

a)

The atomic number is the number of protons in an element

b)

The atomic number is the number of electrons in an element.

c)

The atomic number is the number of neutrons in an element.

d)

The atomic number is the mass of the nucleus of an element.

12.

The horizontal rows on the Periodic Table are referred to as which of the following?

a)

Groups or Families

b)

Periods or Rows

c)

Columns or Rows

d)

Valence or Orbitals

13.

The vertical columns on the Periodic Table are referred to as which of the following?

a)

Groups or Families

b)

Periods or Rows

c)

Columns or Rows

d)

Valence or Orbitals

14.

Calcium (Ca) is in group 2 on the Periodic Table. What does this tell you about this element?

a)

It is not reactive with water.

b)

It has 2 valence electrons.

c)

It has 2 protons in its nucleus.

d)

It has 2 energy levels/shells in its electron cloud.

15.

The atomic number of an element is determined by which of the following?

a)

Number of electrons

b)

Number of neutrons

c)

Number of protons

d)

Number of protons and neutrons

16.
This bonding involves the transfer of electrons from atom to another.
a)
ionic
b)
covalent
c)
metallic
d)
static
17.
This type of bonding involves sharing electrons.
a)
ionic
b)
covalent
c)
metallic
d)
hydrogen
18.
This bonding involves a metal and a nonmetal.
a)
ionic
b)
covalent
c)
sardonic
d)
metallic
19.
A _________ describes a chemical reaction
a)
chemical equation
b)
chemical symbol
c)
chemical formula
d)
product
20.
The substances that are formed in a chemical reaction are called _________
a)
products
b)
reactants
c)
symbols
d)
formulas
21.
The little number inside a chemical formula is called the _________
a)
subscript
b)
coefficient
c)
superscript
d)
symbol
22.

The big number on the front of the chemical formula is called the ______

a)

Coefficient

b)

Element Symbol

c)

Subscript

d)

Atomic Number

23.

How many of each element are in 3Al2(SO4)3

a)

6Al, 9S, 36O

b)

3Al2, 3S, 12O

c)

18Al, 9S, 12O

d)

6Al, 12SO

24.

What are the 3 particles that make-up the atom?

a)

protons, neutrons, and isotopes

b)

neutrons, isotopes, and electrons

c)

positives, negatives, and electrons

d)

protons, neutrons, and electrons

25.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

26.

How many neutron are in the atom "K"?

a)

7

b)

2

c)

39

d)

12

27.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
28.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
29.

True or False? Neutrons have a negative charge

a)

True

b)

False

30.
If I gain electrons I become
a)
Positive because I've added to my atom
b)
negative because I've added electrons
c)
same because i'm balanced
d)
equal because now I have electrons
31.

The proper formula for magnesium hydroxide:

a)

MgOH

b)

Mg2OH

c)

Mg(OH)2

d)

Mg2OH2

32.

How do the following two elements bond together?

Al3+ O2-

a)

AlO

b)

Al2O3

c)

Al3O6

d)

Al3O2

33.
An ion with a positive charge is a/an 
a)
anion
b)
cation
34.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
35.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
36.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
37.
You know you a chemical reaction has occurred if 
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
38.
A molecule is made up of
a)
one or more mixtures.
b)
one or more compounds.
c)
one or more atoms.
d)
one or more solutions.
39.

Which best describes a chemical reaction?

a)

Products --> Reactants

b)

Reactants --> Products

40.

The statements below are the steps involved in an investigation.


P Making hypothesis

Q Identifying and controlling variables

R Identifying problem

S Collecting data

T Making conclusion

U Interpreting data

Which of the following is the correct sequence?😄


a)

P, Q, R, S, T, U

b)

Q, P, R, T, S, U

c)

R, P, Q, S, U, T

d)

R, Q, P, U, S, T

41.

Which of the following is done if a hypothesis is rejected in an experiment?

a)

A theory is made

b)

Variables are changed

c)

A new hypothesis is made

d)

The scientific concept is changed

42.

The higher the temperature of the water,

the higher the mass of sugar dissolved in it.

Which is the responding variable for the above experiment?


a)

Temperature of the water

b)

Mass of sugar dissolved

c)

Volume of the water

d)

Size of the sugar granules

43.

Which one of the following substances consists of atom?

a)

Water, H2O

b)

Zinc metal, Zn

c)

Carbon dioxide gas, CO2

d)

Solid sodium chloride, NaCl

44.

Diagram above shows an experiment to investigate diffusion process in liquid.

What will be the observation after a few hours?

a)

Two layers are formed

b)

A purple solution is formed

c)

A colourless solution is formed

d)

Potassium manganate(VII) crystal remain unchanged

45.

The boiling point of carbon tetrachloride, CCl4 is 76.0 OC.

Which of the following statement is true about the molecules of carbon tetrachloride at 80.0 OC?

a)

The carbon tetrachloride molecules becomes lighter

b)

The distance between the carbon tetrachloride molecules decrease

c)

The kinetic energy of the carbon tetrachloride molecules becomes lower

d)

The forces of attraction between the carbon tetrachloride molecules becomes weaker

46.

Which of the following occurs when liquid naphthalene are cooled at room temperature ?

a)

The particles move faster

b)

The contents of energy increases

c)

The arrangement of particles is not in order

d)

The attraction forces between particles increase

47.

a group of letters and subscript numbers that represent the make-up of a chemical compound

a)

synthesis reaction

b)

single displacement reaction

c)

chemical equation

d)

chemical formula

48.

an atom or a group of atoms that has an electrical charge, either positive or negative

a)

reactant

b)

ion

c)

product

d)

base

49.

two or more reactants combine to make a new product

a)

synthesis reaction

b)

neutralization reaction

c)

single displacement reaction

d)

decomposition reaction

50.

one compound breaks down into two or more simpler compounds

a)

double displacement reaction

b)

decomposition reaction

c)

synthesis reaction

d)

single displacement reaction

51.

a reaction in which one element takes the place of another element in a compound

a)

double displacement reaction

b)

decomposition reaction

c)

synthesis reaction

d)

single displacement reaction

52.

NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?

a)

Acid

b)

Base

c)

Neither (Neutral)

53.

Is pure water acidic, basic, or neutral?

a)

Acidic

b)

Basic

c)

Neutral

54.
hydrochloric acid
a)
HCl
b)
HClO
c)
H3ClO3
d)
HClO3
55.

sulfuric acid

a)

HSO3

b)

H2SO3

c)

H2SO4

d)

H3SO4

56.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
57.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
58.

Basic oxide

a)

BaO

b)

P2O5

c)

ZnO

d)

CO2

59.

Which oxide is able to react with HNO3?

a)

MgO

b)

CO2

c)

NO2

d)

CO

60.

Alkalis are substances that produce OH- ion when dissolved in water.

a)

True

b)

False

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