Question

Use the radius of a rubidium atom from the table below to calculate the number of rubidium atoms in a row 6.00 cm long. Assume that each rubidium atom touches the ones next to it.
Atoms?

Answer 1

Answer:

The answer to your question is:    # of atoms = 2.42 x 10¹⁰

Explanation:

Data

radius = 248 pm

row = 6 cm long

Conversion

                      1 pm ------------------- 1 x 10 ⁻¹⁰ cm

                 248 pm --------------------  x

                     x = (248 x 1 x 10⁻¹⁰) / 1

                     x = 2.48 x 10⁻¹⁰ cm

Divide

                   # of atoms = 6 / 2.48 x 10⁻¹⁰

                  # of atoms = 2.42 x 10¹⁰