Using the periodic table, predict which element-potassium, aluminum, or iron-is most reactive. explain your answer.

How can you easily determine if a covalent bond is present if you are given a formula?

What makes matelloids a group of there own

A chemist makes a solution of Ca (NO3) 2 by dissolving 21.3 g Ca (NO3) 2 in water to make 100.0 mL of solution. What is the concentration of NO3 - ions in the solution? Assume that Ca (NO3) 2 is the only solute in the solution.

Which of the following is NOT one of the three types of compounds? acids salts bases sugars

What is the oxidation number of Nitrogen in HNO2? +1 -1 +3 -3

In the following reaction, how many grams of ammonia (NH3) will produce 300 grams of N2? 4NH3 + 6NO → 5N2 + 6H2O The molar mass of ammonia is 17.0337 grams and that of nitrogen is 28.02 grams.

For each solute, identify the better solvent: water or carbon tetrachloride

If an element has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass?

What did the Cherokee do to assimilate? Check all that apply They invented a writing system. They resisted white settlement. They wrote a constitution. They planted cotton and farmed.

Which of the following correctly compares the radii of Cl and Cl-? Cl has a larger radius than Cl - because Cl has an additional energy shell. Cl has a smaller radius than Cl - because Cl has an expanded electron cloud.