What happens when an atom gains an electron

11. What is the mass number of an element if its atom contains 10 protons, 10 electron, and 12 neutrons? A 12 C20 D. 32

Why is bromine a liquid at room temperature?

What is transferred between a conjugate acid-base pair? a. an electron b. a hydroxide ion c. a hydrogen ion d. a hydronium ion

If you examine the ir spectrum of an unknown how could you tell if it is an alcohol

If acids are compounds that release protons (h+), how is it that sox and nox cause acid rain?

Calculate the mass of grams of 14.79ml of a substance. It'd density is 1.193gml

The molecular weight of NaCl is 58.44 grams/mole. If you had a 1.0 molar solution (1.0 M), you would have to put 58.44 g of salt in 1.0 liter of solution. How many moles of NaCl would you have in 100 mL of this solution

Find an element from the halogen group and noble gases group and tell how it is used in everyday life.

Write the name of the following compound MgSO4 • H20

What volume (in mililiters) of oxygen gas is required to react with 4.03 g of my at stp