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Chemistry Quiz 3

Total questions: 43

Worksheet time: 26mins

Name
Class
Date
1.
What is at the center of every atom?
a)

An electron

b)

A compound

c)

A molecule

d)

A nucleus

2.
The positively charged particles of an atom are the ________.
a)
electrons
b)
protons
c)
neutrons
d)
protons & neutrons
3.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
4.

The subatomic particles that make up an atom.

a)

solid, liquid, gas

b)

electrons, protons, nucleus

c)

energy, protons, nucleus

d)

electrons, protons, neutrons

5.

__________ are negatively charged particles that are in the orbitals around the nucleus.

a)

protons

b)

nucleus

c)

neutrons

d)

electrons

6.

A proton has a ___________ charge.

a)

positive

b)

negative

c)

neutral

d)

massive.

7.

An electron has a _________ charge

a)

positive

b)

neutral

c)

negative

d)

massive

8.

A neutron has _________ charge or is ________.

a)

negative ... neutral

b)

positive .... neutral

c)

no .... negative

d)

no ... neutral

9.
Which is an electron?
a)
A
b)
B
c)
C
10.

The negatively charged particles in an atom

a)

Proton

b)

Electron

c)

Neutron

d)

Electron Cloud

11.

Which TWO of the following subatomic particles are inside the nucleus?

a)

protons

b)

electrons

c)

neutrons

d)

There are no subatomic particles in the nucleus of an atom.

12.

How many atoms of Hydrogen are in H2O

a)

1

b)

2

c)

3

d)

more than 3

13.

A substance made up of atoms of two or more different elements joined by chemical bonds

a)

Molecule

b)

compound

c)

polar covalent bond

d)

nonpolar covalent bond

14.

Which of the following shows the elements with correct numbers of ATOMS for this molecule

H2SO4

a)

H = 2, S = 4, O = 4

b)

H = 2, S = 1, O = 4

c)

H = 8, S = 4, O = 4

d)

H = 2, SO = 4

15.

A subscript is the small number below the element symbol that tells the number of _______ of that element.

a)

atoms

b)

valence electrons

c)

protons

d)

elements

16.

Which of the following is a molecule of a compound?

a)

H2H_2

b)

Cl2Cl_2

c)

H2OH_2O

d)

F2F_2

17.

How many elements are in this chemical formula? NaHCO3NaHCO_3  

a)

1

b)

2

c)

3

d)

4

18.
How are elements on the periodic table arranged by?
a)
in alphabetic order
b)
simular physical & chemical properties
c)
their symbols
d)
Just simular physical properties
19.
Each column in the periodic table is called a _________ .
a)
period
b)
group
c)
cluster
d)
unit
20.

The Atomic number is known as the _______

a)

Number of electrons in an atom

b)

Number of Protons in an atom

c)

Number of neutrons in an atom

d)

Number of Protons and electrons in an atom

21.

What is Atomic Mass Number ?

a)

Number of Protons

b)

Number of Neutrons

c)

Number of Protons and Neutrons

d)

Number of Protons and Electrons

22.

The number of electrons in an atom is equal to the...

a)

Atomic number

b)

Protons

c)

Atomic Mass

d)

Neutrons

23.

The formula used to calculate the number of neutrons is:

a)

Mass Number - Atomic Number

b)

Protons + Electrons

c)

Atomic Number - Mass Number

d)

Protons x2

24.

Elements in the same group have : (2 correct answers)

a)

Similar chemical properties

b)

Similar names

c)

Same number of outer (valence) electrons)

d)

The same number of protons

25.

The periodic table is arranged in order of...

a)

increasing atomic number

b)

increasing atomic mass

c)

decreasing atomic mass

d)

decreasing atomic number

26.

At room temperature, most elements are classified as...

a)

non-metal

b)

metal

c)

mettalloids

d)

halogens

27.

Which of the following are located along a dividing line that looks like a staircase?

a)

metals

b)

metalloids

c)

non-metals

d)

alkali metals

28.

Which of the following is a property of non-metals?

a)

malleable (easily reshaped w/o breaking)

b)

brittle (easily broken)

c)

ductile (capable of being drown out into a wire or thread)

29.

How many neutrons are found in an oxygen (O) atom?

a)

8

b)

15

c)

16

d)

24

30.

How many electrons are found in a nitrogen (N) atom?

a)

7

b)

14

c)

21

d)

22

31.

How many oxygen atoms are found in a molecule of water (H2O)?

a)

1

b)

2

c)

3

d)

4

32.
Which substance supports burning?
a)
Hydrogen
b)
Nitrogen
c)
Oxygen
d)
Carbon Dioxide
33.

What is the test for oxygen gas?

a)

Burns with a pop

b)

Turns limewater cloudy

c)

Extinguishes a lit splint

d)

Relights a glowing splint

34.

Which if the correct method for testing for hydrogen gas?

a)

Hold the tube containing the gas upright and place a lighted wooden splinter at the end of the tube.

b)

Hold the tube containing the gas upright and place a glowing splint at the end of the tube.

c)

Hold the tube containing the gas angled down and place a lit splint at the end of the tube.

d)

Hold the tube containing the gas angled down and place a glowing splint at the end of the tube.

35.

Use the clue to identify the mystery gas:

When a lighted wooden splinter is placed near the opening of a test tube containing the gas, a popping sound is heard.

a)

Carbon dioxide

b)

Chlorine

c)

Hydrogen

d)

Oxygen

36.

What is the correct observation when a glowing wooden splinter is held at the entrance of a tube of pure oxygen gas?

a)

A 'squeaky pop' sound can be heard

b)

The glowing woonden splinter will relights

c)

The glowing wooden splinter is immediately extinguished.

37.

A substance made up of two or more types of atoms that are NOT chemically combined is called a(n)

a)

element

b)

compound

c)

mixture

38.

Is SULFUR (S) an element or a compound?

a)

ELEMENT

b)

COMPOUND

39.

Is CARBON DIOXIDE (CO2) an element or a compound?

a)

ELEMENT

b)

COMPOUND

40.

When the element is heated, the electrons jump to higher energy level and this is called the ___ state.

a)

ground

b)

excited

41.

Flame tests are most useful for

a)

blood testing

b)

watching fireworks

c)

identification of elements

d)

none of the above

42.

If Copper Chloride turned green, which of these would most likely turn green?

a)

Lead Chloride

b)

Sodium Chloride

c)

Copper Sulfate

d)

Potassium Sulfate

43.

How do we excite electrons?

a)

ice them

b)

heat them up

c)

add radiation

d)

give them sugar

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