Chemistry Review

Substances produced at the end of the reaction, right side of the chemical formula

• Element

• Symbol

• Reactants

• Products

Number of a chemical element in the periodic table. Also, the same as Protons and Electrons.

• Valence Electrons

• Atomic Number

• Atomic Mass

• Symbol

Outer shell electron, can participate in formation of chemical bond

• Energy Level

• Valence Electron

• Negative Electron

• Valence Shell

Tags

NGSS.HS-PS1-1

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Releases heat (thermal energy), reaction is hotter than its surroundings.

• Exothermic Reaction

• Allergic Reaction

• Endothermic Reaction

• Energy Reaction

What is the main difference between a chemical change and a physical change?

• Chemical changes are reversible, physical changes are not

• Physical changes create new substances, chemical changes do not

• Chemical changes create new substances, physical changes do not

• Physical changes involve energy, chemical changes do not

Tags

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Which of the following is a chemical property of matter?

• Color

• Density

• Flammability

• Melting point

What is the result of a chemical reaction between vinegar and baking soda?

• Water

• Carbon dioxide gas

• Oxygen gas

• Hydrogen gas

Tags

NGSS.MS-PS1-2

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Substances that go into a chemical reaction, on left side of chemical formula

• Products

• Reactants

• Symbol

• Element

Indicate how many molecules or elements there are in a chemical formula. Example: 5H₂O₃

• Coefficient

• Symbol

• Subscript

• Yield

Tags

NGSS.MS-PS1-1

how many of the element symbols there are in a chemical formula. (tiny number). Example: H₂O₃

• Coefficient

• Yield

• Symbol

• Subscript