Which list includes elements with the most similar chemical properties? 1. Br, Ga, Hg 2. Cr, Pb, Xe 3. O, S, Se 4. N, O, F

If an element contains 8 electrons how many electrons will be placed in the 2nd valence shell? 6 2 8 5 11

Elias stretches a rubber band and lets it go. The rubber band flies across the room. Elias says this demonstrates the transformation of kinetic energy to elastic potential energy. Is Elias correct?

What is the mass of a 4.00cm3 piece of sod chloride having density of 2.16 g/cm3

Which category does the ion PO43 - belong to? monatomic cation monatomic anion polyatomic anion polyatomic cation monatomic ion

Polysaccharides always:a. are a string of 3 or more sugar molecules. b. contain lipids. c. are polymers. d. The first and second choices are correct. e. The first and third choices are correct.

C12 has 6 protons. how many neutrons does c13 have? a. 6 b. 7 c. 13 d. 19

Imagine you are at a local water park on a hot summer day and your feet begin to get hot from the cement. Looking ahead, you notice that there are two paths you can take to your favorite waterslide.

Determine the pH of a 0.350 M solution of HA. The pkb of A - is 12.830.

Which statement is true about oxygen-17 and oxygen-18?

A man is making chicken noodle soup and has found it to be too salty. What method could he use to make the soup less salty? a. Add equal measured amounts of water to the soup. b. Bring the soup to a boil so that some of the broth evaporates. c.