Write the empirical formula and draw Lewis dot structures for these ionic compounds:
sodium chloride
magnesium sulfide
beryllium phosphide
calcium fluoride
potassium oxide
strontium bromide
potassium iodide
lithium bromide
barium nitride

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

Which of the following is true about the speed of light? it depends on the wavelength.