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Atoms, elements, compounds, mixtures and the PT.

Total questions: 53

Worksheet time: 32mins

Name
Class
Date
1.
A mixture that appears to be evenly mixed throughout:
a)
an atom
b)
a compound
c)
a homogeneous mixture
d)
a heterogeneous mixture
2.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
3.

Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is ---

a)

a gas at room temperature.

b)

made of two different elements.

c)

given off by green plants.

d)

useful to human beings

4.

A section of the Periodic Table is shown. What is the Chemical Symbol for Magnesium?

a)

12

b)

Magnesium

c)

24.31

d)

Mg

5.

The smallest particle of any particular type of matter is known by which of the following terms?

a)

Element

b)

Chemical

c)

Atom

d)

Compound

6.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
7.

A compound consists of two or more elements chemically bonded together.

a)
True
b)
False
8.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
9.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
10.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
11.

The chemical symbol of an element always matches the element's name.

a)

Agree

b)

Disagree

12.

What is the difference between Co and CO?

a)

CO is an element but Co is a compound

b)

Nothing is different. They are the same thing.

c)

CO is two elements and Co is only one element

d)

Co is not a pure substance

13.

How many elements are in this compound?

a)

13

b)

6

c)

4

d)

3

14.

Classify the picture with the correct label

a)

Mixture of compounds

b)

Mixture of elements

c)

Element

d)

Compound

15.
Classify the picture with the correct label.
a)
Compounds
b)
Mixture of Elements
c)
Mixture of Compounds
d)
Mixture of Elements & Compounds
16.
This contains a variety elements and compounds that ARE NOT chemically combined.
a)
Water
b)
Mixture
c)
Elements
d)
Compounds
17.

In this diagram, X represents...

a)

A compound

b)

A mixture

c)

An atom

d)

An element

18.
What is the term for combining 2 or more atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
19.

Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).

a)
methane is an element and carbon and hydrogen are compounds.
b)
carbon, hydrogen, and methane are all elements.
c)
carbon, hydrogen, and methane are all compounds.
d)
carbon and hydrogen are elements and methane is a compound.
20.

How many Nitrogen atoms are in the in H2C3O4N5?

a)

2

b)

3

c)

4

d)

5

21.

How many Aluminum atoms are in Al2O3?

a)

3

b)

2

c)

5

d)

1

22.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
23.

Select the three types of structures elements have.

a)

Monatomic

b)

Compound

c)

Molecular

d)

Lattice

24.

All solids have a closely packed, fixed arrangement of particles.

a)

True

b)

False

25.

The _______ is a measure of the average speed of the particles in a substance.

a)

temperature

b)

density

c)

volume

d)

mass

26.
At higher temperatures
a)
particles in an object have less energy
b)
particles in an object move faster
c)
a gas contracts
27.
A gas
a)
has a definite shape but no definite volume
b)
has a definite volume but no definite shape
c)
has fast-moving particles
28.
Freezing
a)
Solid to gas
b)
Liquid to solid
c)
Gas to solid
d)
Liquid to gas
29.
Boiling
a)
liquid to gas
b)
gas to solid
c)
gas to liquid
d)
solid to liquid
30.

Define a liquid.

a)

Variable shape, Variable volume

b)

Set shape, Variable volume

c)

Set shape, Set volume

d)

Variable shape, Set volume

31.

Particles of a liquid

a)

are tightly packed together and vibrate in a fixed position.

b)

have no viscosity.

c)

decrease in volume with increasing temperature.

d)

are free to slide over one another

32.
What term describes a solid changing to a gas?
a)
Deposition
b)
Sublimation
c)
Evaporation
d)
Freezing
33.

A scientist discovers a new element and wants to give it the symbol GT. Why is this not a valid symbol?

a)

The "T" should be lower case

b)

Both letters should be lower case

c)

Both letters should come from the second half of the alphabet

d)

It should only have one letter

34.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

35.

a row on the Periodic Table of Elements

a)

family

b)

period

c)

row

d)

isotope

36.

What is the atomic number of Barium, Ba? (enlarge the periodic table)

a)

20

b)

38

c)

56

d)

88

37.

What are the vertical columns on the periodic table called?

a)

groups

b)

periods

c)

protons

d)

valence electrons

38.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
39.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
40.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
41.

who discovered the first scientific and systematic periodic table

a)

Henry Mosley

b)

Dmitri Mendeleev

c)

John Dalton

d)

sir Isaac Newton

42.

The element with the symbol Sn

a)

iron

b)

gold

c)

silicon

d)

tin

43.

The element with the symbol Cu

a)

Carbon

b)

Copper

c)

Cesium

d)

Chlorine

44.

The element named after a person

a)

Gold

b)

Mercury

c)

Curium

d)

Polonium

45.

Where are the protons and neutrons located within an atom?

a)

In the nucleus

b)

In the electron cloud

c)

Atoms don't have protons or neutrons

46.

The vertical columns of the periodic table are called...

a)

Periods

b)

Families

c)

Chemical Symbols

d)

Groups

47.

Which part represents the SYMBOL for this element?

a)

14

b)

7

c)

N

d)

Nitrogen

48.

The periodic table is organized in horizontal rows called...

a)

Groups

b)

Periods

c)

Families

d)

Chemical Symbols

49.
What do you call the smallest unit of an element with all the properties of that element?
a)
proton
b)
electron
c)
atom
d)
molecule
50.

What two subatomic particles are contained in the nucleus?

a)

Protons + Electrons

b)

Neutrons + Electrons

c)

Atoms

d)

Protons + Neutrons

51.

What is Matter?

a)

anything that has mass

b)

anything that takes up space

c)

anything that has mass and takes up space

52.

What are the three particles that make up the atom?

a)

clouds, positives, negatives

b)

clouds, energy levels, particles

c)

protons, neutrons, electrons

d)

molecules, electrons, protons

53.

How many elements are there in the periodic table?

a)

118

b)

100

c)

226

d)

too many to count

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