Chemistry Test

Front

What is the total number of atoms in H₂SO₄?

Back

7

Front

Which of the following is NOT evidence that a chemical reaction has occurred? (produces light/heat, production of a gas, formation of a precipitate, melting)

Back

melting

Front

What property of matter is demonstrated when a metal is hammered into a thin sheet?

Back

Malleability

Front

What is a sign of a chemical change? (Change in shape, Change in temperature, Change in size, Change in texture)

Back

Change in temperature

Front

What is the smallest unit of structure in an element that gives its identity?

Back

atom

Front

Define a chemical reaction.

Back

A process where substances (reactants) are transformed into different substances (products).

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What is a precipitate?

Back

A solid that forms and settles out of a liquid mixture during a chemical reaction.

Front

What is malleability?

Back

The ability of a substance to be hammered or pressed into thin sheets without breaking.