Convert these to formulas: sodium fluoride phosphorus pentachloride calcium carbonate magnesium hydroxide dinitrogen tetroxide iron (iii) chloride iodine trifluoride calcium bicarbonate ammonium sulfide copper (ii) acetate dihydrogen monoxide aluminum oxide barium bromide

1) how many electrons are in each energy level of the following elements? a. he b. na c. na d. ne 2) how many valence electrons are percent in the following atoms? a. s b. mg c. be d. cl 3) which of the following elements are stable as atoms? a. he b. o c. cl d. ar if you are able to provide the work as to how you got the answers that would be greatly appreciated. : )

Identify the missing numbers below to show the result of multiplying the numbers (1.6 × 10-19)(5.0 × 106) = c × 10d

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?