What does the period number indicate on periodic table

Systematic name for Fe2O3 (s)

Assuming dopant atoms are uniformly distributed in a silicon crystal, how far apart are these atoms when the doping concentrations are 5.0x1015 cm-3 and 5.0x1020 cm-3?

Volume of a cone is 200.96 what is the height of the cone

The table shows columns that Brenda uses for her notes on the properties of elements. Her notes state that some elements can react to form basic compounds. Where should Brenda place this property in her table? only in the column for metalloids

If you could learn only one magic spell, but it could only do something mundane and boring, what would the spell do?

If 3.00 g of limestone reacted, what mass of calcium chloride would be produced?

Which four quantities a, b, c and d are required to balance the equation ... aMgO (s) + bHCl (aq) = = > cMgCl2 (aq) + dH2O (l)

Find the number of moles of water that can be formed if you have 134 mol of hydrogen gas and 62 mol of oxygen gas

The amount of kinetic energy an object has depends on its. motion position gravity height

What is the empirical formula of Fe?