Unit 1, 2, 3 Review

Front

An atom of chlorine will always have the same number of ________.

Back

protons

Front

How many significant figures does the following number have: 100.00210?

Back

8

Front

The separation technique that involves heating a solution until the liquid changes into a gaseous state, leaving behind a solid is known as ________.

Back

evaporation

Front

A neutral atom with a nuclear charge of +13 has how many electrons?

Back

13

Front

In a solid, the particles ________.

Back

vibrate in place

Front

What is the definition of an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that object.

Front

What are significant figures?

Back

Digits in a number that contribute to its precision.

Front

What is the process of chromatography used for?

Back

To separate mixtures based on the different rates of movement of components.