The Structure of the Atom Answers

Use the drop-down menus to describe the charges of the subatomic particles.Protons have a charge.

have a 0 charge.

Electrons have a charge.

In an electrically neutral atom, the number of

Which region is indicated by label A?

Using the drop-down menus, complete the table to summarize the properties of the different subatomic particles. A

C

A =

Atoms of which element contain 25 protons?

How many electrons are in an atom of elemental sodium?

Make a He atom with a mass of 4. How many protons did you put in the nucleus?

Use the periodic table to determine which of the following could be an isotope of bromine (Br). Check all that apply.

B

B =

Which element has an atomic number of 16?

Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital (ring)?

C =

Make a N atom with a mass number of 14. How many neutrons are in the nucleus?

Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?