Which pair of elements has the most similar properties?

a. K and He

b. Li and B

c. I and Ca

d. N and P

What is the mass in grams of 4.30 moles of al?

How do humans use oxygen they breathe to release energy from sugar in foods?

How many liters of 18.5 molar HCl stock solution will be needed to make 25.0 liters of 1.5 molar HCl solution? Show the work used to solve this problem.

Calcium carbonate (CaCO3) is heated and decomposes to form calcium oxide (CaO) and carbon dioxide (CO2).

how many neutrons are present in each of the tree elments you idenitifed in your chosen type steel? be sure to show calculations used arrive at answer

When. 455g of anthracene, c14h10, is combusted in a bomb calorimeter that has a water jacket containing 500 g of water, the temperature of the water increases by 8.63 c?

Which of the following would dissolve in water, and why? None of these substances would dissolve in water Candle wax, it is a nonpolar substance Motor oil, its primary IMF is London Dispersion Forces Acetic acid, it ionizes into ions when added to

An atom's central region which is made up of protons and neutrons

Select the name of the period 4 transition element that forms a 3 + diamagnetic ion.

Do Atoms of one element change into Atoms of another element during chemical reactions