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Chemistry Midterm Review 1

Total questions: 56

Worksheet time: 2hrs 52mins

Name
Class
Date
1.
There are __?__ significant digits in the number 90,000.00
a)
1
b)
2
c)
5
d)
7
2.
There are __?__ significant digits in the number 0.00076
a)
2
b)
4
c)
5
d)
6
3.

How many significant digits are there in 8.20 x 104?

a)

1

b)

2

c)

3

d)

4

4.
Change from standard form to scientific notation: 12,000,000
a)
12.0  x  107
b)
0.12  x  107
c)
1.2  x  106
d)
1.2  x  107
5.
Change from standard form to scientific notation:  0.000398
a)
39.8  x  10-5
b)
3.98  x  10-5
c)
3.98  x  10-4
d)
39.8  x  10-6
6.

Change from standard form to scientific notation:  0.34

a)

3.40  x  101

b)

34  x  10-2

c)

3.4  x  101

d)

3.4 X 10-1

7.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
rust
8.
Fizzing, foaming, and burning are all examples of
a)
Chemical change
b)
Physical change
9.
Rust on an iron bar is an example of chemical change.
a)
True 
b)
False
10.

Which of the following is an example of chemical change?

a)

Filling up a balloon with hot air.

b)

Taking a glass of water and freezing it by placing it in the freezer.

c)

A plant collecting sunlight and turning it into food.

d)

Your dog ripping up your homework.

11.

Food breaking down in stomach acid

a)

physical change

b)

chemical change

c)

mechanical digestion

d)

change of form

12.
A neutron has a charge of
a)
+2
b)
No charge
c)
-1
d)
+1
13.
An element's identity is determined by the number of
a)
electrons.
b)
protons.
c)
neutrons.
d)
valence.
14.
Elements can have the same number of protons?
a)
True
b)
False
15.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
16.

What is the center of an atom called?

a)

The headquarters

b)

The centrometer

c)

The hypothesis

d)

The nucleus

17.
What property did Menedleev use to organize his first periodic table?
a)
atomic number
b)
atomic mass
c)
alphabetical order
d)
chemical properties
18.

In the modern periodic table elements are arranged by:

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

19.

A vertical column is called a ________ on the Periodic Table

a)

Group

b)

Orbital

c)

Proton

d)

Neutron

20.

The number of neutrons in an atom can be found by

a)

adding the number of neutrons and protons together.

b)

adding the atomic mass and the atomic number.

c)

subtratcting the atomic number from the atomic mass.

d)

subtracting the atomic mass from the atomic number.

21.

Rows in the Periodic Table are called

a)

Periods

b)

Groups/Families

c)

Cousins

d)

Metals

22.

The elements that touch the zigzag line on the Periodic Table are called

a)

metals

b)

nonmetals

c)

metalloids

d)

gasses

23.

What do atoms of the same periodic group have in common?

a)

They have the same atomic number.

b)

They have the same chemical symbols.

c)

The have similar chemical properties.

d)

They have the same atomic mass.

24.

The smallest particle of an element that has the same chemical properties of the element is

a)

a molecule of that element.

b)

an atom of that element.

c)

a proton of that element.

d)

the nucleus of the element.

25.

Protons have a ____________ charge, neutrons have a ____________ charge, and electrons have a ____________ charge.

a)

positive; negative, neutral

b)

positive, neutral, negative

c)

neutral, negative, positive

d)

negative, neutral, positive

26.

Which elements have 1 valence electron?

a)

period 1

b)

group 1

c)

group 4

27.

periods on the periodic table tell you

a)

the number of valence electrons

b)

the number of protons

c)

the number of energy levels

d)

the total number of subatomic particles in the element

28.

groups on the periodic table tell you

a)

the number of energy levels (rings)

b)

the number of protons

c)

the elements identity

d)

the number of valence electrons

29.

What family is highlighted in the picture?

a)

Alkali Metals

b)

Alkaline Earth Metals

c)

Halogens

d)

Noble Gases

30.

What family is dark purple in the picture?

a)

Boron Group

b)

Halogens

c)

Transition Metals

d)

Noble Gases

31.

What family is highlighted in the picture?

a)

Boron Group

b)

Halogens

c)

Transition Metals

d)

Noble Gases

32.

What group of metals is the MOST reactive?

a)

Transition Metals

b)

Metalloids

c)

Alkaline Earth Metals

d)

Alkali Metals

33.

What group of nonmetals is the MOST reactive?

a)

Noble Gases

b)

Nitrogen Group

c)

Halogens

d)

Lanthanides

34.

What type of elements are blue in the picture?

a)

Nonmetals

b)

Metals

c)

Metalloids

35.

What family is highlighted in the picture?

a)

Alkali Metals

b)

Alkaline Earth Metals

c)

Halogens

d)

Noble Gases

36.
If a material can easily be drawn into the shape of a wire, it is
a)
Ductile
b)
Magnetic
c)
Malleable
d)
Reactive
37.
Iron is a good conductor, malleable and magnetic. What type of element is Iron? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
38.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon? 
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
39.

Malleable (property of metal) means that a substance can be shaped, bent, or formed without breaking easily

a)

False

b)

True

40.

This model was the first to show a nucleus, consisting of protons and neutron. Electrons surround the nucleus but are not shown in distinct energy levels.

a)

The "Rutherford Model" of the atom

b)

The "Plum Pudding Model" of the atom

c)

The "Quantum Mechanical Model" of the atom

41.

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. It shows electrons floating freely in a positive region.

a)

The "Plum Pudding Model" of the atom

b)

The "Rutherford Model" of the atom

c)

Democritus's model of the atom

d)

The "Quantum Mechanical Model" of the atom

42.
Ernest Rutherford discovered that atoms were mostly _________________. 
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space. 
43.

Which scientist proposed the "plum pudding model" of the atom?

a)

J. J. Thomson

b)

Joseph Proust

c)

Ernest Rutherford

d)

Antoine Lavoisier

e)

John Dalton

44.

Who was the first to propose that matter consist of indivisible particle of matter called atoms?

a)

John Dalton

b)

Aristotle

c)

Democritus

d)

Plato

45.

In the atomic model nicknamed the "plum pudding" model, what do the plums represent?

a)

the nucleus

b)

the atom

c)

the electrons

d)

the positive material

46.

The cathode-ray tube was used to discover the ____ by ____.

a)

electron by Thomson

b)

electron by Dalton

c)

proton by Thomson

d)

proton by Dalton

e)

electron by Rutherford

47.

What were J. J. Thomson's major contributions to the atomic theory? (Select all that apply)

a)

Discovered the electron

b)

Discovered the nucleus

c)

Studied cathode ray tubes

d)

Proposed a model of the atom with electrons moving around the nucleus

e)

Proposed the "plum pudding" model of the atom

48.

Who proposed that electrons are only found in specific, discrete circular orbits around the nucleus?

a)

Albert Einstein

b)

Erwin Schrodinger

c)

Ernest Rutherford

d)

Niels Bohr

49.
What is the density of a liquid that has a mass of 27g and a volume of 30ml?
a)
0.9 g/ml
b)
3 g/ml
c)
57 g/ml
d)
810 g/ml
50.
A bar of copper has a mass of 216g and a volume of 24cm3. What is the density of copper?  
a)
9g/cm3
b)
.11g/cm3
c)
5184g/cm3
d)
322mL
51.
What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?
a)
13.3 g
b)
13.3 cm3
c)
.075 g
d)
1695 cm3
52.

Which statement is true about compounds?

a)

a pure substance where two or more elements are chemically combined

b)

a homogenous mixture of 2 or more elements

c)

a pure substance containing only one type of atom

d)

a heterogeneous mixture of 2 or more elements chemically combined

53.

Another name for a homogenous mixture is?

a)

colloid

b)

suspension

c)

solution

d)

compound

54.

Ba

a)

Compound

b)

Element

c)

Mixture

55.

KCl2

a)

Compound

b)

Element

c)

Mixture

56.

What type of mixture is salsa

a)

compound

b)

heterogeneous

c)

homogeneous

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