Which of the following elements would be the most reactive?

A. Strontium

B. Nitrogen

C. Chlorine

D. Radon

What are the three main groups in the periodic table

If instructed to remain inside during a chemical attack, you should

In an atom of argon-40, the number of protons a. equals the number of electrons b. equals the number of neutrons c. is less than the number of electrons d. is greater than the number of electr

Which type of matter is composed of two or more elements that are chemically combined in a fixed proportion

A 5.00L tank at - 2.4°C is filled with 16.7g of sulfur hexafluoride gas and 8.88g of dinitrogen monoxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas.

Which of the following statements about igneous rocks is correct A. intrusive igneous rocks are formed when magma is called above the ground. B. Extrusive igneous rocks are formed when magma is cooled above the ground C.

The compound KOH is called

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?