Which group of elements readily loses two electrons to form a compound?

Classify each of the following as a pure substance, a mechanical mixture, or a solution. Soil, Perfume, Baking powder, Glass cleaner.

What is the mass of a 980 N bike

How many grams of magnesium are in 7.43x10^22 atoms of Mg

Which part of a light microscope focuses light onto the specimen through the lens? a. The focuser c. The condenser b. The objectives d. The stage

Why is the increasing amount of carbon dioxide being taken up by the oceans a cause for concern? a. more carbon dioxide causes an increase in carbonic acid (h2co3), which leads to a decrease in the concentration of carbonate ion (co32-) ?

Calculate the voltage if the current is 0.5 A and the resistance is 2.0 Ω.

Moseley's changes to the periodic table were based mainly on what part of the scientific process

Which of the following precautions is important when using a Bunsen burner or Meker burner? a. Set up your work space so that wires and cables cannot accidentally make contact with the flame or hot glassware and meltb.

What explains the fact that no machine is 100 percent efficient? A. Friction transforms mechanical energy into thermal energy. B. Thermal energy is transformed into mechanical energy by friction. C.

For each example of a phase change, identify whether heat is absorbed from the surroundings or released into the surroundings. A popsicle melts on a hot day. Rubbing alcohol evaporates from the surface of the skin.