What element has the greatest number of valence electrons available for bonding? Selenium.

Boron.

Calcium.

Chlorine.

Why is it important for your body to reabsorb salts, proteins and sugars through the kidneys?

Which phase (s) would experience a decrease in the rate of dissolution with an increase in temperature? A. gases only B. solids only C. liquids only D. both gases and liquids

A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the system is raised by 74 K. Calculate the heat lost or gained by the system.

What gas diffuses faster helium or neon?

Element X has five valence electrons, element Y has one valence electron, and element Z has five valence electrons. Which two of these elements are most likely to have similar properties? Explain your answer

Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times Celsius.

What type of overall charge, if any, does the balloon in Diagram B have? Explain how you determined your answer.

Move deep below the ocean's surface

The Ka of an acid is 1.3 x 10^-7. Based on the Ka and its relationship with Kw, what is the value of Kb? Use KaKb=Kw 1.3 x 10^-21 7.7 x 10^-15 1.3 x 10^-14 7.7 x 10^-8

A covalent bond is best described as Question 1 options: the sharing of electrons between atoms. the transfer of electrons. a bond between a metal and a nonmetal. a bond between a metal and a polyatomic ion.