Midterm Exam

Front

How many protons are in an atom of Nitrogen-16?

Back

7

Front

What does electronegativity mean?

Back

Ability to attract electrons.

Front

What is the formula for density?

Back

Density = mass / volume

Front

What are physical properties?

Back

Properties that can be observed without changing the identity of the substance.

Front

Identify the substance in box B: element, compound, or mixture?

Back

Element.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

Define a compound.

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object; weight is the force of gravity acting on that mass.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.