How are the properties of elements determined

What is the number of moles of KF in a 29-gram sample of the compound? 1.0 mol 2.0 mol 0.50 mol 5.0 mol

What gives elements in a family or group similar properties? a. the same atomic mass b. the same number of protons in their nuclei c. the same number of electrons in their outer energy level d. the same number of total electrons?

If convection in the mantle increased how would the earths crust be affected

Use the periodic table to find the molar mass of each element. molar mass H = g/mol molar mass S = g/mol molar mass O = g/mol DONE

Separating sand from gravel physical change or chemical change?

Which statements describe the principles of the Big Bang theory

Is ice cream a mechanical mixture or solution why?

Which term is used to describe the attraction that an oxygen atom has for the electrons in a chemical bond?

Suppose you wanted to dissolve 109 g of sodium carbonate in enough water to make 6.00 L of solution. What is the molarity of this solution?

0.0055 in scientific notation