7 - 1st semester final

Front

What is the term that tells how many protons an element has?

Back

Atomic number

Front

Which type of change indicates that a chemical reaction occurred?

Back

Color change

Front

What happens to energy in an EXOTHERMIC reaction?

Back

Energy is released into the surroundings.

Front

Where would you be able to find elements that are more similar to one another in the periodic table?

Back

In the same group or column of the periodic table.

Front

How many carbon dioxide molecules are in 4CO₂?

Back

4

Front

What is the definition of an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

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

Back

A physical change does not alter the chemical composition, while a chemical change does.

Front

What is the law of conservation of mass?

Back

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

Front

What is a molecule?

Back

A group of two or more atoms bonded together.