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

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

Step-by-step 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