7th Grade Balancing Equations Flashcard

Front

What is a reactant in a chemical equation?

Back

A reactant is a substance that undergoes a chemical change in a reaction, found on the left side of the equation.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved in the reaction.

Front

What is a product in a chemical equation?

Back

A product is a substance that is formed as a result of a chemical reaction, found on the right side of the equation.

Front

What is a subscript in a chemical formula?

Back

A subscript is a small number written to the right of an element symbol that indicates the number of atoms of that element in a molecule.

Front

How many hydrogen atoms are in 4H₂O?

Back

There are 8 hydrogen atoms in 4H₂O.

Front

How many oxygen atoms are in 4H₂O?

Back

There are 4 oxygen atoms in 4H₂O.

Front

Is the equation Al + O₂ → 2Al₂O₃ balanced?

Back

No, the equation is not balanced.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is the difference between a reactant and a product?

Back

A reactant is a starting material in a chemical reaction, while a product is a substance formed as a result of the reaction.