Unit 2 Exam

Front

What does Avogadro's number (6.02 x 10^23) represent?

Back

It's the number of atoms in 1 mole.

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons.

Front

Where are protons located in an atom?

Back

In the nucleus.

Front

Which subshell has the highest energy?

Back

4d.

Front

What is the hyphen notation for a beryllium atom with 6 neutrons?

Back

Beryllium-10.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the role of neutrons in an atom?

Back

They help stabilize the nucleus.