Chemical Equations and Reactions

This type of bond forms between nonmetal atoms when they share electrons

• Ionic bond

• Covalent bond

• metallic bond

This type of bond is an attraction that holds negative and positive ions together.

• ionic bond

• covalent bond

• metallic bond

These bonds form when metallic atoms pool their electrons. Electrons are able to move freely among the positive metal ions.

• ionic bonds

• covalent bonds

• metallic bonds

Electrons in the outermost energy level are called

• satellite electrons

• outer electrons

• valence electrons

Tags

NGSS.HS-PS1-1

In a chemical formula, this number is used to represent the number of each atom being represented.

• Exponent

• Coefficient

• Molecule

• Subscript

Two or more atoms bonded together

• Molecule

• Compund

• Subscript

• Coefficient

Tags

NGSS.MS-PS1-1

This number appears before a chemical formula. It represents how many molecules there are.

• Subscript

• Coefficient

• Molecule

• Atom

When an atom gains or loses an electron, it becomes...

• an isotope

• radioactive

• an ion

• a molecule

When two or more substances combine to form a new substance with new properties.

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change that occurs when matter changes shape or state of matter. This does not change the material into a new substance.

• physical change

• chemical change

Tags

NGSS.MS-PS1-4