Why are the atomic masses for most elements not whole numbers?

What are the types of solution systems chemistry?

Identify the type of bonding in solid potassium.

How many molecules are contained in 0.500 moles of hydrogen gas? A. 1.20 x 1024 molecules B. 6.02 x 10-23 molecules C. 3.01 x 10-23 molecules D. 3.01 x 1023 molecules

If one object has more mass than another then it weighs more or less than the other object?

A stronger nuclear pull as electrons and protons increase leads to:? A. A larger radius as energy levels increase B. Smaller radius as atomic number increases C. A smaller radius as electrons and neutrons both increase D.

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.