Compounds & Mixtures

Fill in the blank: When atoms of two or more elements chemically combine, they form ________.

• compounds

• mixtures

• solutions

• elements

Tags

NGSS.MS-PS1-1

Fill in the blank: A group of atoms that are held together by chemical bonds and act as a unit is called a ________.

• molecule

• atom

• ion

• element

Tags

NGSS.MS-PS1-1

Fill in the blank: Molecules that are made up of two or more of the same element are called ________.

• diatomic molecules

• ionic compounds

• heterogeneous mixtures

• alloys

Tags

NGSS.MS-PS1-1

Fill in the blank: A group of chemical symbols and numbers that represent the elements and the number of atoms of each element in a compound is called a ________.

• chemical formula

• chemical reaction

• atomic number

• molecular mass

Tags

NGSS.MS-PS1-1

Fill in the blank: The numbers at the bottom right corner of the symbol, indicating the number of atoms of the element, are called ________.

• subscript

• superscript

• coefficient

• prefix

Tags

NGSS.MS-PS1-1

Fill in the blank: A way to model a chemical reaction that includes reactants and products is called a ________.

• chemical equation

• chemical bond

• atomic number

• molecular formula

Tags

NGSS.MS-PS1-5

When atoms of one or more substances rearrange to form one or more new substances, it is called a ________.

• chemical reaction

• physical change

• nuclear reaction

• fusion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fill in the blank: The starting substances that exist before a chemical reaction begins are called ________.

• reactants

• products

• catalysts

• solvents

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fill in the blank: The substances produced as a result of a chemical reaction are called ________.

• products

• reactants

• catalysts

• solvents

Tags

NGSS.MS-PS1-5

Fill in the blank: A number placed in front of an element symbol or chemical formula in a chemical equation is called a ________.

• coefficient

• subscript

• reactant

• product