Test #3 - Chemical Reaction, Chemical Energy & Water Properties

Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the “2” tell you?

• Bromide has a 2- charge

• There are 2 magnesium ions to every bromide ion

• There are two bromide ions for every magnesium ion

• Bromide has a 2+ charge

Tags

NGSS.MS-PS1-1

When an atom loses an electron, it becomes a ____.

• A positive ion

• A negative ion

• A neutral ion

• A neutral atom

An ionic bond is the attraction between _____.

• similarly charged ions

• oppositely charged ions

• neutral ions

• neutral atoms

Ions that are made of more than one atom are examples of ____.

• polyatomic ions

• negative ions

• positive ions

• neutral ions

A chemical bond formed when two atoms share electrons is called a (an) ____.

• ionic bond

• covalent bond

• polyatomic bond

• crystal bond

Tags

NGSS.HS-PS1-1

What is the maximum number of valence electrons an atom can have

• 2

• 3

• 8

• 12

Tags

NGSS.MS-PS1-1

What happens when chemical bonds break and new bonds form?

• physical change

• chemical reaction

• matter is being destroyed

• increase in surface area

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

CaCO₃ represents a chemical ____.

• symbol

• formula

• subscript

• reaction

The substances listed on the LEFT side of the equation are called _____>

• products

• coefficients

• precipitates

• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The substances listed on the RIGHT side of a chemical equation are called _____.

• products

• coefficients

• precipitates

• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1