Semester Review #1 Unit 1-4

Front

What type of charge do cations have?

Back

Cations have a positive charge.

Front

What is the common name for sodium bicarbonate (NaHCO3)?

Back

Baking soda is the common name for sodium bicarbonate.

Front

When adding numbers, how many digits past the decimal should you report your answer for 20.34 + 4.582 + 3.2?

Back

You should report your answer with 1 digit past the decimal.

Front

What is the proper equation for determining the number of neutrons in an isotope?

Back

Number of neutrons = mass number - atomic number.

Front

In a correctly written symbol, what is located in the 'A' position?

Back

The 'A' position represents the mass number.

Front

What is the definition of a pure substance?

Back

A pure substance is a material with a constant composition and consistent properties throughout.

Front

What is the definition of a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

How do you calculate the mass number of an atom?

Back

Mass number = number of protons + number of neutrons.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement.