Middle School Chemistry Review

Chemistry Review

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Multiple Choice

Something that takes up space and has mass.

• volume
• matter
• mass
• density

Multiple Choice

What are the states of matter?

• solid, liquid, and juice
• solid and liquid
• solid and gas
• solid, liquid, and gas

Multiple Choice

What is the outcome of observing a chemical property?

• A new substance is formed with different properties

• the substance does not change

Multiple Choice

What effect does observing the physical properties of a substance have on the substance?

• Measuring physical properties changes the chemical identity of the substance

• Observing physical properties has no effect on the substance

• It makes to substance develop a deep seeded distrust of humans

• The substance will undergo an exothermic reaction

Multiple Choice

Choose the one that is a chemical property

• Magnetism

• Size

• Color

• Reactivity with water

Multiple Choice

• physical change
• chemical change

Multiple Choice

Physical or Chemical Change? Iron rusts

• Physical Change

• Chemical Change

Multiple Choice

Water freezing into ice is an example of a...

• Physical Change

• Chemical Change

Multiple Choice

The particles that are found in the nucleus of an atom are

• neutrons and electrons
• electrons only
• protons and neutrons
• protons and electrons

Multiple Choice

Which of the following is a negatively charged subatomic particle?

• Electron

• Proton

• Neutron

• Quark

Multiple Choice

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Multiple Choice

What is the atomic number of this atom?

• 4
• 5
• 9
• none of the above

Multiple Choice

Which of the following properties uniquely identifies every element?

• Number of valence electrons
• Phase at room temperature
• Number of protons
• Charge of the atom

Multiple Choice

What is a valence electron?

• an electron that is found in the outermost orbital of an atom. 
• an electron found in the innermost orbital of an atom.
• an electron found in the middle orbital.

Multiple Choice

B and C are found in the ______ of an atom.

• electron cloud
• Space
• Nucleus
• Outside

Multiple Choice

How many valence electrons does the element have?

• 1

• 2

• 3

• 4

Multiple Choice

What do the vertical columns on the periodic table tell us?

• The number of orbitals

• The number of valence electrons (electrons on the outer most shell)

Multiple Choice

What are the vertical columns on the periodic called?

• groups/

  families

• periods

• nonmetals

• metals

• metalloids

Multiple Choice

a row on the Periodic Table of Elements

• family

• period

• row

• isotope

Multiple Choice

Which elements are found on the left to middle of The Periodic Table and are shiny, good conductors, and malleable?

• Metals

• Nonmetals

• Metalloids

• Candles

Multiple Choice

What kind of substance is composed of two or more elements that are chemically combined?

• element

• mixture

• solution

• compound

Multiple Choice

How many different elements are in an amino acid with the formula C₅H₁₁NO₂S?

• 5

• 20

• 18

• 4

Multiple Choice

How many atoms of Oxygen (O) are in each molecule of H₂SO₄?

• 1

• 4

• 2

• 7

Multiple Choice

Alanine is an amino acid with formula C₃H₇NO_2. How many total atoms in all are in each molecule of alanine?

• 3

• 7

• 12

• 13

Multiple Choice

What does the number 4 represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

Multiple Choice

What does the number ₃ represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

Multiple Select

Select all of the reactants in this chemical equation.

Hydrogen + Oxygen --> Water

H2 + O2 --> H2O

• Hydrogen

  H2

• Oxygen

  O2

• Water

  H2O

Multiple Choice

Select of the products in this chemical equation.

Hydrogen + Oxygen --> Water

H2 + O2 --> H2O

• Hydrogen

  H2

• Oxygen

  O2

• Water

  H2O

Multiple Choice

The Law of Conservation of Mass says that matter can not be __________ or __________.

• created; destroyed

• recycled; renewed

• subtracted; added

• joined; separated

Multiple Choice

Is this equation balanced?

• Yes

• No

Multiple Choice

WHY does this picture demonstrate the Law of Conservation of Mass?

• the number of atoms of each element are the same on both sides

• they start out separate and end up combined

• the same elements are used

• it doesn't demonstrate the Law of Conservation of Mass