One hundred million copper atoms are arranged in a line. which is a reasonable estimate for the length of this line?

What is calcium when it is in it natural state solid liquid or gas?

1) What is the jelly like make matter of the cell that surrounds the cell?

What are the features of erosion?

Give me two sources of air pollution

How are isotopes defined? a. forms of different elements that have the same number of neutrons in each atom b. forms of different elements that have the same number of protons in each atom c.

100 g of water and 100g of metal sample are heated from 25 to 75. which substance requires more thermal energy to reach 75c

A process or reaction which takes in heat from the surroundings is said to be

What is the volume of 0.05 mol of neon gas at STP?

Which is NOT a property of gold? A. rare B. tarnishes C. malleable D. corrosion resistant

The element rubidium has two naturally occurring isotopes. The atomic mass of 85Rb (72.17 percent abundant) is 84.911794 amu. Determine the atomic mass of 87Rb (27.83 percent abundant). The average atomic mass of Rb is 85.4678 amu.