According to the octet rule most elements need_valence electrons.

Calculate the mass percent of nacl in a solution containing 3.00 g of nacl in 50.0 g of water.

What are the [H+] and [OH-] for a substance with a ph of 9.2?

A student is given a stock solution of 1.00 M NaCl in water. They are asked to make 5 mL of 0.0500 M NaCl. How much of the stock solution should they dilute to 5 mL to make the correct concentration? a) 10.0 mL b) 55.5 mL c) 1.00 mL d) 35.3 mL e) 27.

The simple model below is a neutral magnesium (Mg) atom with the element's most common mass number. What must happen to an atom of magnesium in order to become a magnesium ion Mg+2? a. It must lose two neutrons and become a different isotope. b.

A balloon inflated in a room that is 34 C has a volume of 5.00 liters. The room is then heated to a temperature of 68 C. What is the new volume of the pressure remains constant?

Maya's playroom is 12 m2. The length of the room is 3 m. What is the width? 4 m 8 m 15 m 36 m

How many moles of each element are in this sample p2o3

Does uranium or barium nucleus have a stronger net force holding its protons

Which statement correctly compares DNA and RNA? DNA is made up of a single strand, and RNA is made up of a double strand. DNA is made up of a double strand, and RNA is made up of a single strand. Both DNA and RNA are made up of a single strand.

Which electron configuration represents the electrons in an atom of Ga in an excited state?