Chemistry - Equations

Identify the product(s) in the following word equation:

sodium reacts with chlorine to yield sodium chloride

• Sodium

• Sodium chloride

• Sodium and Chlorine

• Sodium and sodium chloride

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which statement is TRUE of reactants in a chemical reaction?

• You write them on the right-hand side of the arrow.

• They are what get produced in a chemical reaction.

• They always stay the same.

• Are the substances that you start with.

Tags

NGSS.MS-PS1-1

What are the new substances that are formed in a chemical reaction called?

• Reactants

• Atoms

• Products

• Reagents

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does the symbol inside the circle mean?

• "yields, or produces"

• "dissolved in water"

• "forms a precipitate"

• "released as a gas"

Tags

NGSS.MS-PS1-5

Which of the following statements is TRUE?

• A molecule is smaller than an atom.

• A molecule is made of atoms.

• Molecules are found inside of atoms.

Tags

NGSS.MS-PS1-1

Which of the following statements about atoms is TRUE?

• An atom is a blob of gelatinous goo.

• An atom is bigger than a molecule.

• An atom is made of many molecules.

• An atom is a basic piece of matter.

Which of the following symbols represents a compound?

• Co

• Br

• Fe

• CO

Tags

NGSS.MS-PS1-1

Which of the following symbols shows only ONE element?

• CU

• Ar

• KF

• WO

What does the symbol CaCO₃ represent?

• An element

• A compound

• An atom

• None of the above

Tags

NGSS.MS-PS1-1

Which of the following chemical equations is correct for the word equation:

Solid magnesium is burned in oxygen gas to produce solid magnesium oxide.

• Mg + O₂→ MgO (aq)

• Mg+ O→ MgO (s)

• Mg + CO₂ → MgO (s) + C

• Mg + O₂→ MgO (s)

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5