Which of these elements has two electrons in its outer p orbitals?

helium (He)

barium (Ba)

nitrogen (N)

silicon (Si)

sulfur (S)

A 55g piece of copper wire is heated and the temperature of the wire changes 19 to 86 the amount of heat absorbed is 343 cal what is the specific heat of copper

Which of the following describes the characteristics of a solid? a. Particles are packed closely together in an organized way and maintain their set shape and volume. b.

Iodine has 53 protons and 74 neutrons: what is the atomic number? What is the atomic mass?

Genetically-identical individuals

At 10°c the gas in a cylinderhas a volume of 0.250 l. the gas is allowed to expand to 0.285 l. what must the final temperature be for the pressure to remain constant?

The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct? A) The enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature.

What's the Compound for CO?

How to measure a bag of flour

If the pH of a wine is too high, say, 4.0 or above, the wine becomes unstable and has a flat taste. (a) A certain California red wine has a pH of 3.5, and a certain Italian white wine has a pH of 2.9.

Sodium hydroxide reacts with carbon dioxide as follows: which is the limiting reactant when 1.85 mol naoh and 1.