The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by side to span a distance of 2.66 mm?

number=2.66E-3m/214E-12m=

I get about 12372093 or 1.24E7

To find out how many strontium atoms would have to be laid side by side to span a distance of 2.66 mm, we need to calculate the number of atoms that fit within the given distance.

1. Convert the radius of the strontium atom from picometers (pm) to millimeters (mm):
215 pm ÷ 1000 = 0.215 mm

2. Then, calculate the diameter of a single strontium atom:
Diameter = 2 × Radius = 2 × 0.215 mm = 0.43 mm

3. Next, find the number of atoms that can fit within the given distance:
Number of atoms = Distance ÷ Diameter

Number of atoms = 2.66 mm ÷ 0.43 mm = 6.19

Since we can't have a fraction of an atom, we round the number down to the nearest whole number.

Therefore, you would need 6 strontium atoms laid side by side to span a distance of 2.66 mm.