The element with electron configuration 1s2 2s2 2p6 3s2 3p2 is

According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other. Many stars have planets around them.

Thermal energy is created when a firefighter slides down a pole. Where does this energy come from?

How does most of the water cycle move from lakes and rivers directly back into the atmosphere

A 0.210 mol sample of pcl5 (g) is injected into an empty 2.45 l reaction vessel held at 250 °c. calculate the concentrations of pcl5 (g) and pcl3 (g) at equilibrium.

The oxidation numbers of nitrogen in NH3, HNO3, and NO2 are, respectively: - 3, - 5, + 4 + 3, + 5, + 4 - 3, + 5, - 4 - 3, + 5, + 4

Which of the following statements is true? A. Some chemical reactions release energy, and other chemical reactions absorb energy. B. Chemical reactions, by definition, cannot absorb or release energy. C.

4 Properties of Bases?

Which statement best describes the intermolecular forces between N2 molecules and NH3 molecules in the solid phase? A.

How many grams of water are needed to react with 485 g of calcium carbide

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. True False