Unit 1 Matter and Chemical Reactions

_______ are columns. The group number is at the top of the column.

• Periods

• Rows

• Groups

• Elements

_______ are rows. The period number is to the left of the entire row.

• Periods

• Rows

• Groups

• Elements

Which set of properties describe this part of the periodic table.

• Shiny, Conductors, Ductile, Malleable

• Dull, Insulators, Brittle

• Properties of both, Semiconductors

An __________ is a substance that cannot be broken down. It is represented by a __________ symbol.

• element, single

• compound, element

• element, double

• compound, double

Tags

NGSS.MS-PS1-1

A __________ is two or more elements chemically combined. (Hint: You will see two different symbols.)

• element

• compound

• mixture

• solution

Tags

NGSS.MS-PS1-1

_________ changes will change the material's appearance but do not break chemical bonds between atoms.

• Chemical

• Physical

Tags

NGSS.MS-PS1-4

In a chemical change, the bonds between valence electrons will break and the atoms are free to reattach to form a ______.

• new substance

• physical change

• mixture

• solution

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

__________ are the beginning substances that are combined and changed in a chemical equation.

• Products

• Reactants

• Catalysts

• Enzymes

Tags

NGSS.MS-PS1-5

________ are the substances formed from the chemical reaction.

• Reactants

• Catalysts

• Products

• Enzymes

Tags

NGSS.MS-PS1-2

The __________ states that the total mass of the reactants must equal the mass of the products.

• Law of Conservation of Energy

• Law of Conservation of Mass

• Law of Chemical Equilibrium

• Law of Thermodynamics

Tags

NGSS.MS-PS1-5