Chemical equations and reactions

Number written below & to the right of a chemical symbol

• subscript
• reactant
• product
• coefficient

Number placed in front of a chemical formula

• product
• coefficient
• reactant
• subscript

a series of symbols and formulas that represents a chemical reaction

• reactant

• product

• Chemical equation

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are the 3 main components of a chemical equation?

• reactants

• hot dogs

• yield arrow

• stop sign

• product(s)

Tags

NGSS.MS-PS1-5

The arrow in a chemical equation means to yield, or ​ (a)   .

• produce
• destroy
• make magic
• create out of thin air

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Tags

NGSS.MS-PS1-5

Chemical reactions occur when _________ are broken and new bonds are formed.

• mixtures
• atoms

• physical bonds
• chemical bonds

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-5

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Select the reactants in the chemical equation.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2