Quiz about Intro To Chemistry

Question 1

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

Accepted Answer

Element

Answer

Compound

Answer

Mixture

Answer

Molecule

Question 2

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

Solution

Answer

Atom

Question 3

This picture represents:

Accepted Answer

Compound

Answer

Element

Answer

Mixture of Elements

Answer

Mixture of Compounds

Question 4

The temperature at which a SOLID becomes a LIQUID.

Accepted Answer

melting point

Answer

freezing point

Answer

viscosity

Answer

solubility

Question 5

Properties that can be observed directly or measured without changing the chemical identity of the substance.

Accepted Answer

physical properties

Answer

chemical properties

Answer

soluable properties

Answer

density properties

Question 6

Which of the following is an example of a physical property?

Accepted Answer

all of these are physical properties

Answer

mass

Answer

shape

Answer

luster

Question 7

_______ are the smallest structure of living things.

Accepted Answer

Cells

Answer

Atoms

Answer

Molecules

Answer

Elements

Question 8

all matter is made of what

Accepted Answer

atoms

Answer

energy

Answer

electrons

Answer

compounds

Question 9

The positive particles of an atom are

Accepted Answer

protons

Answer

electrons

Answer

positrons

Answer

neutrons

Question 10

the central region of an atom where its neutrons and protons are is its

Accepted Answer

nucleus

Answer

electron cloud

Answer

core

Answer

center

Question 11

an atom with atomic number 6 would have how many protons

Accepted Answer

6

Answer

12

Answer

3

Answer

cannot be determined

Question 12

Particles in an atom that are neutral and have no charge are

Accepted Answer

neutrons

Answer

negatrons

Answer

electrons

Answer

protons

Question 13

How many protons does this atom have?

Accepted Answer

5

Answer

2.5

Answer

6

Answer

10.811

Question 14

What part of the atom is the arrow pointing to?

Accepted Answer

electron shell

Answer

nucleus

Answer

proton

Answer

electron

Question 15

If the number of protons equal the number of _____, the atom will have no charge

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Answer

nucleus

Question 16

Which of the following represents an element?

Accepted Answer

H2

Answer

H2O

Answer

NaCl

Answer

CaCO3

Question 17

An element is made up of only one kind of _____.

Accepted Answer

atom

Answer

isotope

Answer

plastic

Answer

metal

Question 18

What subatomic particles would you find in the nucleus of an atom?

Accepted Answer

Protons and Neutrons

Answer

Protons only

Answer

Neutrons and Electrons

Answer

Protons and Electrons

Question 19

What subatomic particle(s) would be found orbiting the nucleus?

Accepted Answer

Electrons only

Answer

Neutrons only

Answer

Protons and Neutrons

Answer

Protons and Electrons

Question 20

What are the 3 subatomic particles that make-up the atom?

Accepted Answer

protons, neutrons, and electrons

Answer

protons, neutrons, and isotopes

Answer

neutrons, isotopes, and electrons

Answer

positives, negatives, and electrons

Question 21

Protons have a ____ charge.

Accepted Answer

Positive

Answer

Negative

Answer

No charge

Question 22

Electrons have a ____ charge.

Accepted Answer

Negative

Answer

Positive

Answer

No charge

Question 23

Neutrons have a ____ charge.

Accepted Answer

No charge

Answer

Positive

Answer

Negative

Question 24

Which of the following in not a compound?

Accepted Answer

H2

Answer

H2O

Answer

CO2

Answer

NaCl

Question 25

An atom is much bigger than a cell.

Accepted Answer

False

Answer

True

Question 26

At atom is the smallest unit of matter.

Accepted Answer

True

Answer

False

Question 27

Elements get heavier as you go from the top to the bottom of the Periodic Table.

Accepted Answer

True

Answer

False

Question 28

How many hydrogen atoms are in a single methane molecule? CH₄

Accepted Answer

4

Answer

3

Answer

5

Answer

6

Answer

1

Question 29

How many protons does a single atom of Carbon have in it's center?

Accepted Answer

6

Answer

1

Answer

3

Answer

5

Answer

12

Question 30

What element has an atomic number of 76?

Accepted Answer

Osmium

Answer

Titanium

Answer

Mercury

Answer

Gold

Question 31

When two or more atoms combine chemically we call that a?

Accepted Answer

molecule

Answer

element

Answer

solid

Answer

proton

Question 32

Particles in an atom that are neutral and have no charge are

Accepted Answer

neutrons

Answer

negatrons

Answer

electrons

Answer

protons

Question 33

What are the three main states of matter?

Accepted Answer

solid

Accepted Answer

liquid

Accepted Answer

gas

Answer

temperature

Answer

air

Question 34

This diagram represents...

Accepted Answer

A mixture of elements and compounds

Answer

An element

Answer

A molecule

Answer

A compound

Question 35

Question 35.

Accepted Answer

mixture of elements

Answer

element

Answer

compound

Answer

mixture of compounds

Question 36

Question 36.

Accepted Answer

element

Answer

compound

Answer

mixture of elements

Answer

mixture of compounds

Question 37

What is a compound?

Accepted Answer

A molecule that is formed from two different elements/atoms.

Answer

A molecule that is formed from two or more of the same element/atom.

Answer

A tiny atom that makes up an atom.

Answer

The center of an atom that is formed by neutrons. protons, and electrons.

Question 38

Which of the following cannot be broken down into something simpler?

Accepted Answer

an element

Answer

a compound

Answer

a chemical formula

Answer

a mixture

Question 39

If a compound has 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms, its chemical formula must be...

Accepted Answer

$$C_{12}H_{22}O_{11}$$

Answer

12C22H11O

Answer

$$C_{11}H_{22}O_{12}$$

Answer

$$2C_{11}H_{22}O_{12}$$

Question 40

What is the symbol of the element: gold?

Accepted Answer

Au

Answer

Ag

Answer

As

Answer

Ap

Question 41

What is the best formula for this molecule?

Accepted Answer

C3H8

Answer

C3H2

Answer

CH

Answer

CH8

Question 42

At what temperature does water Freeze?

Accepted Answer

0o C

Answer

100o C

Answer

32o C

Answer

-273o C

Answer

-212o C

Question 43

At what temperature does water Freeze?

Accepted Answer

32o F

Answer

0o F

Answer

100o F

Answer

-273o F

Answer

-212o F

Question 44

At what temperature does water boil?

Accepted Answer

212o F

Answer

0o F

Answer

100o F

Answer

32o F

Answer

-273o F

Question 45

At what temperature does water Boil?

Accepted Answer

100o C

Answer

0o C

Answer

32o C

Answer

212o C

Question 46

The change of state from SOLID to LIQUID is called?

Accepted Answer

Melting

Answer

Freezing

Answer

Evaporating

Question 47

4CF₂Cl₂

Accepted Answer

C = 4, F = 8, Cl = 8

Answer

C = 4, F = 4, Cl = 2

Answer

C = 1, F = 8, Cl = 8

Answer

C = 1, F = 4, Cl = 8

Question 48

How many Hydrogen are in 4H₂O?

Accepted Answer

8

Answer

6

Answer

2

Answer

4

Question 49

A force that holds two or more atoms by sharing electrons

Accepted Answer

chemical bond

Answer

proton

Answer

compound

Answer

element

Question 50

If graphite and diamonds are both made of only carbon atoms, why are they different substances?

Accepted Answer

The arrangement of the atoms

Answer

Their temperatures

Answer

One is worth more money

Answer

They are made of different elements

Question 51

The image to the left is a water molecule. The spheres in this image represent ___________.

Accepted Answer

atoms

Answer

molecules

Answer

compounds

Answer

cells

Answer

chemical bonds

Question 52

The image to the left is a water molecule. The rods or lines in this image represent ___________.

Accepted Answer

chemical bonds

Answer

atoms

Answer

molecules

Answer

compounds

Answer

cells

Question 53

What is a chemical formula?

Accepted Answer

A group of chemical symbols and numbers that represent the elements and the number of atoms of each element in a compound.

Answer

A list of all known elements.

Answer

A description of a chemical reaction.

Answer

A formula for calculating atomic mass.

Question 54

In the following lewis structure, how many bonds are around the central atom?

Accepted Answer

4 bonds

Answer

1 bond

Answer

2 bonds

Answer

3 bonds

Question 55

A student creates a ball-and-stick model of a substance. Which of the following BEST describes the model?

Accepted Answer

one molecule with 4 atoms

Answer

one atom with 4 molecules

Answer

four molecules representing four atoms

Answer

four elements representing one atom

Question 56

Ignore the question on the picture-- What is the chemical formula for ethene (choice B in picture)

Accepted Answer

C2H6

Answer

C2H4

Answer

C2H6O

Answer

C2H4

Answer

CO2

Question 57

Ignore the question on the picture-- Which diagram has the most chemical bonds?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 58

Color is what type of property?

Accepted Answer

Physical

Answer

Chemical

Question 59

Reactivity is what type of property?

Accepted Answer

Chemical

Answer

Physical

Intro To Chemistry

60 questions

What is a pure substance that cannot be broken down into any other substances by chemical or physical means (Ex. Oxygen)?

What is a pure substance made of 2 or more elements chemically combined in a specific ratio (Ex. Water)?

This picture represents:

The temperature at which a SOLID becomes a LIQUID.

Properties that can be observed directly or measured without changing the chemical identity of the substance.

Which of the following is an example of a physical property?

_______ are the smallest structure of living things.

all matter is made of what

The positive particles of an atom are

the central region of an atom where its neutrons and protons are is its

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