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Nead Chem Ch 3-4 Review

Total questions: 35

Worksheet time: 9hrs 45mins

Name
Class
Date
1.
In which state does matter completely fill its closed container?
a)
Gas
b)
Liquid
c)
Solid
d)
Ice
2.

Physical properties of a substance include _________ (choose all that apply)

a)

color and odor

b)

melting and boiling points

c)

density

d)

all of the choices are correct

3.
All of these are examples of chemical properties except...
a)
Flammability
b)
Combusting
c)
Fizzing
d)
Boiling Point
4.
Intensive property is dependent on the amount of a substance. 
a)
True
b)
False
5.
Find the percent composition of compound that contains 1.51 g of chromium, 1.13 g of potassium, and 1.62 g of oxygen.  The total mass of the sample is 4.26 g.
a)
Cr = 26.5%; K = 38.0%; O = 35.4%
b)
Cr = 38.0%; K = 35.4%; O = 26.5%
c)
Cr = 38.0%; K = 26.5%; O = 35.4%
d)
Cr = 35.4%; K = 26.5%; O = 38.0%
6.
Smallest unit of an element
a)
compound
b)
atom
c)
molecule
d)
product
7.
Substance that cannot be broken into simpler substances
a)
element
b)
molecule
c)
gram
d)
proton
8.
Substance made up of chemically combined elements
a)
atom
b)
element
c)
electron
d)
compound
9.
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
10.
Italian Salad Dressing
a)
heterogeneous mixture
b)
homogeneous mixture
11.
Olive Oil
a)
Heterogeneous  mixture
b)
Homogeneous mixture
12.
Choose the particle that has no charge.
a)
nucleus
b)
neutron
c)
proton
d)
electron
13.
This causes the mass of the nucleus to increase.
a)
adding an electron
b)
adding a neutron
c)
more orbitals
d)
adding negatively charged particles
14.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
15.
Silicon-30 has an atomic mass of:
a)
14
b)
15
c)
16
d)
30
16.
The number of neutrons in this atom is:
a)
15
b)
5
c)
Not enough information is available
d)
10
17.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
18.
The majority of an atom's mass exists where?
a)
In the nucleus
b)
In the electron cloud
c)
In the space between the nucleus and the electrons
d)
In the neutrons
19.
This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.
a)
Democritus's model of the atom
b)
The "Plum Pudding Model" of the atom
c)
The "Rutherford Model" of the atom
d)
The "Solar System Model" of the atom
20.
Calculate the average atomic mass of element X when 34% of element X exists as X-272 and the remainder exists as X-274.
a)
185.64amu
b)
273.32amu
c)
272.68amu
d)
27.33amu
21.

Elements on the periodic table are arranged by what characteristics? (choose all that apply)

a)

density

b)

chemical properties

c)

solubility

d)

spelling

e)

physical properties

22.

Which is an indication of a chemical change?

a)

melting

b)

color change

c)

gas produced (bubbles, fizzing)

d)

size change (cutting)

e)

freezing into a solid

23.

In our lab we put copper wire into a beaker of silver nitrate. What were the products? (click all that apply)

a)

silver

b)

silver nitrate

c)

copper nitrate

d)

copper silverate

e)

water

24.

Which scientist thought the atom was in the form of "plum pudding" where electrons floated in a positive body of fluid?

a)

Bohr

b)

Thomson

c)

Rutherford

d)

Schrodinger

e)

Democritus

25.

What was Bohr's nuclear atomic model like?

a)

a positive nucleus is surrounded by electron orbits, orbits have levels

b)

a negative nucleus is surrounded by positive electron orbits

c)

electrons don't orbit the nucleus but have areas where they appear

d)

the atom is a solid sphere of uniform matter

26.

What age would some scientists say we live in and why?

a)

iron, as we need it for solar cells

b)

steel, as we use a lot of it for buildings

c)

silicon, as we use a lot of it for technology

d)

bronze, as we use it for sculpture

27.

Why is silicon so important for technology today? (choose all that apply)

a)

it has only 5 protons

b)

it is inexpensive

c)

it is abundant (found in sand), 2nd most abundant element in Earth's crust

d)

it conducts electricity

28.

Matter is divided into two groups ______ and _________

a)

element

b)

mixture

c)

pure substance

d)

heterogeneous mixture

e)

compound

29.

What are the two types of mixtures?

a)

homogeneous

b)

element

c)

compound

d)

heterogenous

30.

What are the two types of substances?

a)

element

b)

homogeneous

c)

heterogeneous

d)

compounds

31.

Which atomic particle has nearly no mass?

a)

proton

b)

neutron

c)

orbital

d)

electron

32.

Look on the periodic table for the element germanium. How many neutrons does it have in its nucleus?

a)

40

b)

32

c)

72

d)

104

33.

How many protons does an atom of bismuth have?

a)

209

b)

208

c)

125

d)

83

34.

Choose the phase changes

a)

melting

b)

boiling

c)

sublimation

d)

condensation

e)

deposition

35.

Atoms are isotopes of one another under what conditions?

a)

they have different numbers of electrons

b)

they have different numbers of protons

c)

they have different numbers of neutrons

d)

they have different shaped orbitals

e)

they have an unstable nucleus

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