Quiz about Chemical

Question 1

The smallest part of an element is a/an

Accepted Answer

atom

Answer

nucleus

Answer

isotope

Answer

ion

Question 2

Which of the following is not a part of an atom?

Accepted Answer

scantron

Answer

proton

Answer

neutron

Answer

electron

Question 3

What is equal to the atomic number?

Accepted Answer

the number of protons in an atom

Answer

the number of ions in an atom

Answer

the number of electrons in an atom

Answer

the number of isotopes in an atom

Question 4

Electrons in the outermost shell are known as the....

Accepted Answer

valence electrons

Answer

ionic neutrons

Answer

valence neutrons

Answer

ionic electrons

Question 5

The attraction that holds atoms close to each other is know as....

Accepted Answer

chemical bonding

Answer

chemical formulas

Answer

chemical sharing

Answer

The Law of Conservation of Mass

Question 6

Which of the following is NOT a chemical bond

Accepted Answer

atomic

Answer

ionic

Answer

covalent

Answer

metallic

Question 7

When atoms of a non-metal gain or lose electrons to a metal, which type of chemical bond is made?

Accepted Answer

ionic

Answer

covalent

Answer

atomic

Answer

metallic

Question 8

When a non-metal shares electrons with another non-metal, which type of chemical bond is formed?

Accepted Answer

covalent

Answer

ionic

Answer

atomic

Answer

metallic

Question 9

Which of the following is NOT a chemical reaction?

Accepted Answer

oxidation

Answer

combustion

Answer

acid to base

Answer

decompostion

Question 10

This illustrates what is happening in a chemical reaction.

Accepted Answer

chemical equation

Answer

valence electrons

Answer

chemical displacement

Answer

chemical sentence

Question 11

Substances that are ALWAYS found on the LEFT side of the chemical equation are called...

Accepted Answer

reactants

Answer

products

Answer

symbols

Answer

bases

Question 12

Substances that are ALWAYS found on the RIGHT side of the chemical equation are called...

Accepted Answer

products

Answer

reactants

Answer

symbols

Answer

bases

Question 13

How many atoms of carbon are included in one formula unit of the compound Na₂C₂O₄

Accepted Answer

2

Answer

4

Answer

8

Answer

1

Question 14

Balance this equation:

_SnO₂+_H₂-->_SnO₂ +_H₄

Accepted Answer

1,2,1,1

Answer

1,1,2,1

Answer

1,2,1,2

Answer

1,2,2,1

Question 15

The compound potassium sulfate, K₂SO₄, is composed of

Accepted Answer

2 atoms of potassium, 1 atom of sulfur, and 4 atoms of oxygen

Answer

2 atoms of potassium, 4 atoms of sulfur, and 4 atoms of oxygen

Answer

two molecules of potassium and one molecule of sulfate

Answer

one molecule of potassium and two molecules of sulfate

Question 16

Which chemical symbol stands for copper?

Accepted Answer

Cu

Answer

C

Answer

Co

Answer

Cp

Question 17

The diagram shows a chemical reaction that occurs between hydrogen and oxygen.

Which scientific law is BEST demonstrated by the reaction shown in the diagram?

Accepted Answer

law of conservation of mass

Answer

law of angular momentum

Answer

law of universal gravitation

Answer

law of conservation of energy

Question 18

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

Accepted Answer

coefficient

Answer

charge

Answer

random number

Answer

subscript

Question 19

What does the Law of Conservation of Mass state?

Accepted Answer

Matter cannot be gained or lost in a chemical reaction.

Answer

Matter can only be gained in a chemical reaction.

Answer

Matter can only be lost in a chemical reaction.

Answer

Matter can be gained and lost in a chemical reaction.

Question 20

Which side of a chemical equation is the product side?

Accepted Answer

Right (after the yields sign)

Answer

Left (before the yields sign)

Question 21

Which problem is balanced?

Accepted Answer

2Na + 2H₂O --> 2NaOH + H₂

Answer

PbO₂ + 2H₂--> H₂SO₄

Answer

SO₂ + H₂0 --> H₂SO₄

Answer

2Na + 2H₂O --> 2NaOH + H

Question 22

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

Accepted Answer

already balanced

Answer

1, 2,1

Answer

2,1,1

Answer

1,1,2

Question 23

Which elements are(is) not balanced?
LiNO₃ +CaBr₂ --> Ca(NO₃)₂ + LiBr

Accepted Answer

O and N

Answer

Li

Answer

Ca and Li

Answer

Ca

Question 24

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Accepted Answer

Yields

Answer

Reactants

Answer

Products

Answer

Chemical Equation

Question 25

What is a coefficient?

Accepted Answer

The large number to the left of a formula.

Answer

The small number on the right of the chemical symbol.

Question 26

Is this equation balanced?

Accepted Answer

yes

Answer

no

Answer

Not enough information

Question 27

What is the little number after an element in a chemical equation called.
Example: H₂

Accepted Answer

Subscript

Answer

Coefficient

Answer

Atom

Answer

Equation

Question 28

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

Accepted Answer

the mass is the same

Answer

the product is doubled

Answer

the product is half the mass of the reactants

Answer

the mass changes depending on the reaction

Question 29

CaCO₃ represents a chemical

Accepted Answer

Formula

Answer

Symbol

Answer

Subscript

Answer

Reaction

Question 30

Identify the reactant(s) and product(s) of the reaction.

Accepted Answer

Hydrogen and oxygen are the reactants, and water is the product.

Answer

All three are reactants and none are products.

Answer

Hydrogen and water are the reactants, and oxygen is the product.

Answer

Water and oxygen are the reactants, and hydrogen is the product.

Question 31

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

Accepted Answer

16

Answer

2

Answer

8

Answer

5

Question 32

Equations are balanced by placing a ____ before the chemical formulas.

Accepted Answer

coefficient

Answer

charge

Answer

subscript

Answer

superscript

Question 33

How many oxygen atoms are present in the following?
4Ca(OH)₂

Accepted Answer

8

Answer

4

Answer

6

Answer

1

Question 34

Why must we balance chemical equations?

Accepted Answer

to abide by the law of conservation of mass

Answer

Our teacher said so

Answer

to abide by the law of conservation of energy

Question 35

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

Accepted Answer

Products

Answer

Reactants

Answer

Yields

Answer

Chemical Equation

Question 36

What is the little number after an element in a chemical equation called.
Example: H₂

Accepted Answer

Subscript

Answer

Coefficient

Answer

Atom

Answer

Equation

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