Final Semester Test (Early)

Front

What is the mass of a sodium (Na) atom with 11 neutrons?

Back

22

Front

What should a student count first to identify an element?

Back

The number of protons.

Front

What is the formula mass of H₂SO₄?

Back

98 amu

Front

What is the atomic number of sodium?

Back

11

Front

What electrical charge does a proton have?

Back

+1

Front

What is the atomic mass of sodium (Na)?

Back

23 amu

Front

How many neutrons does a sodium atom with a mass number of 23 have?

Back

12 neutrons.

Front

What is the relationship between protons and atomic number?

Back

The atomic number is equal to the number of protons in an atom.

Front

What is the charge of an electron?

Back

-1

Front

What is the formula for calculating the mass number of an atom?

Back

Mass number = Protons + Neutrons