Combining Matter

Multiple Choice

1 A substance made up of two or more chemically combined elements is —

• an element

• mixture

• compound

• solution

Multiple Choice

NaHCO₃ is an example of —

• an abbreviation
• a compound
• a mixture
• an element

Multiple Choice

Table salt, or sodium chloride has the chemical formula NaCl. How is sodium chloride classified?

• as an element

• . as a compound

• as a mixture

• as a liquid

Multiple Choice

How are covalent compounds formed?

• when electrons are gained or lost

• when electrons are transferred

• when electrons are shared

• none of the above

Multiple Choice

Which two elements will form a covalent bond?

• Magnesium and Chlorine

• Sodium and Bromine

• Iron and Sulfur

• Carbon and Oxygen

Multiple Choice

What do we call a covalent bond where electrons are shared UNEVENLY or UNEQUALLY?

• Ionic
• Polar Covalent
• Nonpolar Covalent
• Van der Waals Force

Multiple Choice

The positive ions tend to _____________ electrons.

• lose

• gain

Multiple Choice

The negative ions tend to _____________ electrons.

• lose

• gain

Multiple Choice

Ionic bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

Multiple Choice

Where are the nonmetals located on the periodic table? 

• Blue
• Red
• Green

Multiple Choice

Where are metals located on the periodic table?

• Blue
• Green
• Red

Multiple Choice

Ionic bonds form between two ions that have...

• ionic compounds
• negative charges
• positive charges
• opposite charges

Multiple Choice

A metallic bond is a bond between ________.

• nonmetals

• metals

• transition metals

• metalloids

Multiple Choice

What do electrons do in a metallic bond?

• They stay on the metal atom.

• They are transferred from atom to atom.

• They form a covalent bond with another atom.

• They float around freely.

Multiple Choice

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with
• must be an even number
• can be different to the number you finish with
• changes depending on how much energy is formed

Multiple Choice

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

Multiple Choice

In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?

• 17g
• 2g
• 7g
• None of the above

Multiple Choice

Type of mixture that has the SAME COMPOSITION in every part.

• Homogenous

• Heterogeneous

Multiple Choice

Type of mixture that DOESN'T HAVE the same composition in every part.

• Homogeneous

• Heterogeneous

Multiple Choice

Combination of two or more pure substances that are not chemically combined

• compound          
• atom
• mixture 
• element

Multiple Choice

Which is the best set of tools to use for separating a mixture of water, sugar, and pebbles?

• a filter and a magnet
• a filter and a hot plate
• a magnet and a hot plate
• a settling tank and a filter

Multiple Choice

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

Multiple Choice

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

Multiple Choice

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

Multiple Choice

Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.

• lower
• higher
• the same
• none of the above

Multiple Choice

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid
• cabbage
• milk

Multiple Choice

Bleach is a strong base, what is the pH level of bleach?

• 13
• 14
• 1
• 2

Multiple Choice

Which of the following is the strongest acid?

• 1

• 5

• 3

• 8

Multiple Choice

Which of the following is the strongest base?

• 4

• 14

• 7

• 15