Question 1

What is the smallest particle of an element that retains its properties?

Accepted Answer

Atom

Answer

Ion

Answer

Molecule

Answer

Compound

Question 2

Which of the following elements is a metal?

Accepted Answer

Iron

Answer

Chlorine

Answer

Carbon

Answer

Oxygen

Question 3

What is the law of conservation of mass?

Accepted Answer

Matter cannot be created or destroyed

Answer

Matter can only be created

Answer

Matter can be created or destroyed

Answer

Matter can only be destroyed

Question 4

What is a chemical reaction?

Accepted Answer

A process where the identity of a substance changes

Answer

A process where the identity of a substance becomes unknown

Answer

A process where the identity of a substance changes only in color

Answer

A process where the identity of a substance remains the same

Question 5

What is a product?

Accepted Answer

A substance that is created by a chemical reaction

Answer

A substance that is a reactant of a chemical reaction

Answer

A substance that is not affected by a chemical reaction

Answer

A substance that undergoes a chemical reaction

Question 6

What is a coefficient?

Accepted Answer

A number that represents the number of molecules in a chemical equation

Answer

A number that represents the elements in a chemical equation

Answer

A number that represents the charge of an ion in a chemical equation

Answer

A number that represents the temperature of a chemical reaction

Question 7

What is a subscript?

Accepted Answer

A number that represents the number of atoms in a molecule

Answer

A number that represents the temperature of a chemical reaction

Answer

A number that represents the number of molecules in a chemical equation

Answer

A number that represents the charge of an ion in a chemical equation

Question 8

What part of an atom has a negative charge?

Accepted Answer

Electron

Answer

Neutron

Answer

Nucleus

Answer

Proton

Question 9

What part of an atom has a positive charge?

Accepted Answer

Proton

Answer

Neutron

Answer

Nucleus

Answer

Electron

Question 10

What does the atomic number of an element represent?

Accepted Answer

Number of protons in the nucleus

Answer

Number of atoms in the element

Answer

Number of neutrons in the nucleus

Answer

Number of electrons in the atom

Question 11

What is the term for the total number of protons and neutrons in an atom?

Accepted Answer

Atomic mass

Answer

Atomic number

Answer

Periodic table

Answer

Electron cloud

Question 12

What is the term for the region around an atomic nucleus where an electron is likely to be found?

Accepted Answer

Electron cloud

Answer

Proton

Answer

Neutron

Answer

Nucleus

Question 13

What is the term for the horizontal rows on the periodic table?

Accepted Answer

Period

Answer

Column

Answer

Family

Answer

Group

Question 14

What is the term for the vertical columns on the periodic table?

Accepted Answer

Group

Answer

Column

Answer

Family

Answer

Period

Question 15

What is the atomic number of carbon?

Accepted Answer

6

Answer

12

Answer

10

Answer

8

Question 16

What is the most reactive metal?

Accepted Answer

Francium

Answer

Iodine

Answer

Beryllium

Answer

Fluorine

Question 17

What is the atomic number of chlorine?

Accepted Answer

17

Answer

21

Answer

23

Answer

19

Question 18

What is the symbol for the element located in the third row and fifth column of the periodic table?

Accepted Answer

B

Answer

C

Answer

N

Question 19

What element is located directly below sodium in the periodic table?

Accepted Answer

Potassium

Answer

Lithium

Answer

Magnesium

Question 20

What is the symbol for the element located in the second row and seventh column of the periodic table?

Accepted Answer

F

Answer

Cl

Answer

Br

Question 21

What is the only non-metal in the first row of the periodic table?

Accepted Answer

Hydrogen

Answer

Carbon

Answer

Oxygen

Question 22

What is the symbol for the element located in the fourth row and sixth column of the periodic table?

Accepted Answer

Se

Answer

Ge

Answer

Sn

Question 23

What is the group number for the alkaline earth metals?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 24

What type of element is neon?

Accepted Answer

Noble gas

Answer

Alkali metal

Answer

Halogens

Answer

Transition metal

Question 25

Which of the following is a property of nonmetals?

Accepted Answer

Poor conductors of heat and electricity

Answer

High melting point

Answer

Ductile

Answer

Malleable

Question 26

Which of the following is a halogen?

Accepted Answer

Iodine

Answer

Iron

Answer

Calcium

Answer

Sodium

Question 27

How many valence electrons does nitrogen have?

Accepted Answer

5

Answer

4

Answer

7

Answer

6

Question 28

What is the maximum number of valence electrons an atom can have?

Accepted Answer

8

Answer

6

Answer

4

Answer

2

Question 29

Which group of elements in the periodic table have 8 valence electrons?

Accepted Answer

Noble gases

Answer

Alkali metals

Answer

Halogens

Answer

Transition metals

Question 30

What is the maximum number of valence electrons in the second shell?

Accepted Answer

8

Answer

4

Answer

2

Answer

6

Question 31

Which group of elements in the periodic table have only 1 valence electron?

Accepted Answer

Alkali metals

Answer

Halogens

Answer

Transition metals

Answer

Noble gases

Question 32

Which element has 6 valence electrons?

Accepted Answer

Oxygen

Answer

Nitrogen

Answer

Fluorine

Answer

Carbon

Question 33

Which element has 2 valence electrons?

Accepted Answer

Helium

Answer

Sodium

Answer

Argon

Answer

Lithium

Question 34

Which element has 7 valence electrons?

Accepted Answer

Chlorine

Answer

Neon

Answer

Bohrium

Answer

Francium

Question 35

Which element has 4 valence electrons?

Accepted Answer

Carbon

Answer

Aluminum

Answer

Magnesium

Answer

Silicon

Question 36

What is the atomic number of an element?

Accepted Answer

The number of protons in the nucleus of an atom of that element.

Answer

The overall charge of the atom.

Answer

The number of electrons in the nucleus of an atom of that element.

Answer

The number of neutrons in the nucleus of an atom of that element.

Question 37

What is the atomic mass of an element?

Accepted Answer

The total number of protons and neutrons in the nucleus of an atom of that element.

Answer

The overall charge of the atom.

Answer

The number of neutrons in the nucleus of an atom of that element.

Answer

The number of protons in the nucleus of an atom of that element.

Question 38

How can you determine the number of protons in an atom?

Accepted Answer

It is equal to the atomic number of the element.

Answer

It is equal to the number of neutrons in the atom.

Answer

It is equal to the atomic mass of the element.

Answer

It is equal to the number of electrons in the atom.

Question 39

How can you determine the number of neutrons in an atom?

Accepted Answer

It is equal to the atomic mass minus the number of protons.

Answer

It is equal to the atomic number minus the number of protons.

Answer

It is equal to the number of electrons in the atom.

Answer

It is equal to the overall charge of the atom.

Question 40

How many electrons are in a neutral atom of oxygen?

Accepted Answer

8

Answer

12

Answer

6

Answer

10

Question 41

How many neutrons are in an atom of chlorine with an atomic mass of 35?

Accepted Answer

18

Answer

35

Answer

17

Answer

19

Question 42

How many atoms are in 3H2O?

Accepted Answer

9

Answer

6

Answer

3

Answer

1

Question 43

How many oxygen atoms are in Ca(NO3)2?

Accepted Answer

12

Answer

6

Answer

2

Answer

10

Question 44

What is the total number of atoms on the reactant side of the following unbalanced equation? H2SO4 + NaOH → Na2SO4 + H2O

Accepted Answer

9

Answer

7

Answer

5

Answer

11

Question 45

What is the total number of atoms on the product side of the following unbalanced equation? C2H5OH + O2 → CO2 + H2O

Accepted Answer

7

Answer

13

Answer

11

Answer

5

Question 46

What is the coefficient in the balanced equation: 2 H2 + O2 -> 2 H2O?

Accepted Answer

2

Answer

3

Answer

1

Answer

4

Question 47

What are some signs of a chemical reaction?

Accepted Answer

Formation of gas, formation of a precipitate, change in color, release or absorption of energy.

Answer

Formation of a liquid, change in texture, release of a smell.

Answer

Change in color, release of a sound, formation of a liquid.

Answer

Formation of a gas, change in texture, release or absorption of energy.

Question 48

What is the formula for calculating density?

Accepted Answer

Mass / Volume

Answer

Velocity x Time

Answer

Length x Width x Height

Answer

Force x Distance

Question 49

What is the density of an object that has a mass of 25 grams and a volume of 5 cm³?

Accepted Answer

5 g/cm³

Answer

20 g/cm³

Answer

15 g/cm³

Answer

10 g/cm³

Question 50

What is the density of a substance if it has a mass of 50 grams and a volume of 25 cm³?

Accepted Answer

2 g/cm³

Answer

6 g/cm³

Answer

4 g/cm³

Answer

8 g/cm³

Question 51

What is the formula for calculating volume?

Accepted Answer

Mass / Density

Answer

Mass + Density

Answer

Mass x Density

Answer

Density / Mass

Question 52

Which of the following is a physical change?

Accepted Answer

Melting ice cubes

Answer

Cooking an egg

Answer

Rusting iron

Answer

Burning paper

Question 53

Which of the following is a chemical change?

Accepted Answer

Baking a cake

Answer

Cutting paper

Answer

Mixing sugar and water

Answer

Freezing water

Question 54

Which of the following is a sign of a chemical change?

Accepted Answer

A color change

Answer

A change in temperature

Answer

A change in shape

Answer

A change in state

Question 55

Which of the following is a chemical property?

Accepted Answer

Ability to rust

Answer

Ability to conduct electricity

Answer

Ability to reflect light

Answer

Ability to dissolve in water

Question 56

Which of the following is a physical change?

Accepted Answer

Breaking a glass

Answer

Rotting fruit

Answer

Burning wood

Answer

Digesting food

Question 57

Which of the following is an example of a chemical change?

Accepted Answer

Digesting food

Answer

Melting plastic

Answer

Sharpening a pencil

Answer

Crushing a can

Question 58

Which of the following is a sign of a physical change?

Accepted Answer

A change in shape

Answer

A change in color

Answer

A change in temperature

Answer

A change in smell

Question 59

Which of the following is a physical change?

Accepted Answer

Cutting paper

Answer

Decomposing leaves

Answer

Burning gasoline

Answer

Mixing baking soda and vinegar

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