How Many Atoms Are in a Drop of Mercury That

question 31

Multiple Choice

How many atoms are in a drop of mercury that has a diameter of 1.0 mm? (Volume of a sphere is 4r³/3; density of mercury = 13.6 g/cm³)

• A) 2.1 × 10¹⁹
• B) 1.7 × 10²⁰
• C) 2.1 × 10²²
• D) 1.7 × 10²³
• E) none of the above