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Chem exam 1 Fall 22

Total questions: 60

Worksheet time: 2hrs 0mins

Name
Class
Date
1.

A physical property that measures mass per unit volume

a)

density

b)

flammability

c)

physical property

d)

element

e)

reactivity

2.

characteristic/trait that can be seen through direct observation of a substance.

a)

mixture

b)

physical property

c)

physical change

d)

chemical property

e)

chemical change

3.

an example of a physical change

a)

flammability

b)

fireworks exploding

c)

rust

d)

melting

4.

has a definite volume but takes the shape of its container

a)

solid

b)

liquid

c)

gas

d)

plasma

e)

Bose-Einstein condensate

5.

Anything that has mass and volume.

a)

solid

b)

liquid

c)

gas

d)

matter

e)

mixture

6.

a homogenous mixture

a)

solid

b)

solution

c)

matter

d)

compound

7.

transforms one type of matter into another type of matter

a)

physical change

b)

physical property

c)

chemical change

d)

chemical property

8.

a mixture that has the same composition throughout the entire substance

a)

heterogenous mixture

b)

homogenous mixture

c)

pure substance

d)

matter

9.

observed when a substance changes into a new substance

a)

physical property

b)

chemical property

c)

physical change

d)

chemical change

10.

a change to a substance that does NOT change the identity of the substance

a)

physical change

b)

physical property

c)

chemical change

d)

chemical property

11.

used to observe and describe matter

a)

physical property

b)

physical change

c)

chemical property

d)

chemical change

12.

something that will always have the same composition

a)

matter

b)

compound

c)

pure substance

d)

mixture

e)

solution

13.

matter that has a fixed shape and volume (rigid)

a)

solid

b)

liquid

c)

gas

d)

plasma

e)

Bose-Einstein condensate

14.

a substance made from two or more different elements

a)

matter

b)

mixture

c)

compound

d)

pure substance

e)

solution

15.

matter that has no fixed volume or shape - it takes the shape and volume of its container

a)

solid

b)

liquid

c)

gas

16.

something that has a variable composition

a)

matter

b)

mixture

c)

compound

d)

pure substance

e)

solution

17.

a substance that cannot be broken down into other substances

a)

matter

b)

mixture

c)

element

d)

solid

e)

solution

18.

a mixture that has a different composition throughout the substance

a)

heterogenous mixture

b)

compound

c)

homogeneous mixture

d)

element

19.
What are the three states of matter?
a)
solid, volume, mass
b)
density, volume, mass
c)
solid, liquid, gas
d)
density, gas, volume
20.

H2O is an example of a(n):

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

21.

Tap water (water, salt & minerals) is an example of a(n):

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

22.

Methane (CH4) is an example of a(n):

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

23.

Which of the following is a physical property?

a)

Heat of combustion

b)

Boiling point

c)

Flammability

d)

Reactivity

24.

Which of the following is NOT a sign that a chemical change has occurred?

a)

Change in color

b)

Change in shape

c)

Formation of a gas

d)

Change in odor

25.

Which of the following is a chemical property of water?

a)

Reacts with pure sodium.

b)

Boils at 100 oC.

c)

Dissolves sugar easily.

d)

Has a density of 1 gm/mL

26.

Sugar dissolving in water is an example of a:

a)

chemical change.

b)

physical change.

27.
What is the name for a column on the Periodic Table?
a)
Group
b)
Period
c)
Halogen
d)
Alkali
28.
What is the name for a row on the Periodic Table?
a)
Group
b)
Period
c)
Lanthanide
d)
Actinide
29.
What is the first noble gas listed on the Periodic Table? (Use the tables posted around the room to help if you need!)
a)
Hydrogen
b)
Helium
c)
Neon
d)
Boron
30.
How are elements of the Periodic Table organized?
a)
Alphabetically
b)
Chronologically
c)
By atomic mass
d)
By atomic number
31.
What is the equation for density?
a)
Mass divided by volume
b)
Volume divided by mass
c)
Mass times volume
d)
Volume times mass
32.
What is the symbol for chlorine?
a)
C
b)
Ch
c)
Ce
d)
Cl
33.
Which of these elements has a symbol which DOES NOT include a letter from its name?
a)
iron
b)
helium
c)
magnesium
d)
zinc
34.
What is the symbol for the element Neon?
a)
Na
b)
Ne
c)
He
d)
N
35.

What is the name of the chemist who codified the chemical symbols still used today on the Periodic Table

a)

John Dalton

b)

Jöns Jacob Berzelius

c)

Antoine Levoisier

d)

Robert Boyle

36.

Chemical symbols are predicated on the elements' names in what language?

a)

English

b)

German

c)

Latin

d)

Greek

37.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
38.
A precipitate is a 
a)
liquid that forms when two solids are reacted
b)
a solid that forms when two liquids are mixed
c)
a gas that forms when vinegar and baking soda react
d)
a change of color in a solution
39.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
40.

_________ are the substances that are produced in a chemical reaction.

a)

Reactants

b)

Producer

c)

Reaction

d)

Product

41.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

42.

Potassium-39 has how many neutrons?

a)

19

b)

18

c)

20

d)

21

43.

Nickel-59 has how many neutrons?

a)

30

b)

31

c)

32

d)

33

44.

12 protons and 13 neutrons

a)

Mg-12

b)

Mg-13

c)

Mg-25

d)

Mg-24.305

45.
What atom matches this electron configuration?
1s2 2s2 2p6 3s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
46.
Which is the electron configuration for an oxygen atom?
a)
1s22s22p63s23p64s2
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p6
47.

What is this element?

1s22s22p63s23p64s23d104p6

a)

Argon

b)

Krypton

c)

Selenium

d)

Bromide

48.
What is the shorthand electron configuration for Sulfur atom?
a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p3
49.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
50.
Light is emitted when electrons ...
a)
jump from high to low 
b)
jump from low to high 
c)
either of these
d)
none of these
51.
High frequency waves have _________ wavelengths.
a)
varying
b)
long
c)
the same
d)
short
52.
Which model of the atom said that electrons circle the nucleus in orbits of a fixed radius?
a)
Bohr model
b)
Quantum mechanical model
c)
Not true of either model
d)
Both Bohr and Quantum mechanical model
53.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
a)
Hund’s Rule
b)
Aufbau Principle
c)
Pauli Exclusion Principle
54.

states that it is not possible to know precisely both the velocity and the position of a particle at the same time

a)

Heisenberg uncertainty principle

b)

Pauli exclusion principle

c)

Aufbau principle

d)

quantum mechanical model of the atom

55.

a phenomenon in which photoelectrons are emitted from a metal's surface when light of a certain frequency shines on the surface

a)

photon

b)

quantum

c)

ground state

d)

photoelectric effect

56.

a particle of electromagnetic radiation with no mass that carries a quantum of energy

a)

photon

b)

atomic emission spectrum

c)

photoelectric effect

d)

quantum

57.

represented by the symbol h; equal to 6.626 × 10-34 J•s

a)

de Broglie equation

b)

planck's constant

c)

electron-dot structure

d)

Heisenberg uncertainty principle

58.

What is the speed of light?

a)

3.0x108 ms

b)

3.0x108 m/s

c)

6.626x10-34 Js

d)

6.626x10-34 J/s

59.

When an electron returns to ground state from an excited state, the atom will

a)

emit energy

b)

absorb energy

c)

rotate

d)

wiggle

60.

This scientist discovered the photoelectric effect.

a)

Albert Einstein

b)

Max Planck

c)

James Chadwick

d)

Robert Millikan

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