How many valence electrons does "Na" (atomic number 11) have?

Bacteria and fungi break down organisms into nutrients. They are known as secondary consumers. primary consumers. producers. decomposers.

Fault block mountains are formed when a shift takes place along a fault line and

Can ocean currents be caused by differences in water temperature

What best describes measuring with a graduated cylinder?

Which of the following Van der waals forces would have the most action among molecules of methane (CH4) ? A) Dipole-dipole B) ion-dipole C) london dispersion 2.

How many grams of the excess reactant remain assuming the reaction goes to completion and that you start with 15.5g of na2s and 12.1g cuso4?

Which elements can be found in the sun? a. hydrogen and oxygen b. helium and oxygen c. hydrogen and helium d. hydrogen and nitrogen?

A sample of hydrogen gas at 2.0 atmospheres and 273 k occupies a volume of 5.0 liters. the gas sample is completely transferred to a 10.0-liter sealed, rigid container.

To make sure that the white powder was all sodium chloride and not mixed with sodium hydrogen carbonate, would you need to add a little less or a little more hydrochloric acid to the reaction?

A 10.0 gram sample of h2o at 23.0c absorbs 209 joules of heat. what is the final temperature