Which element has the same number of energy levels as krypton (Kr) and the same number of valence electrons as nitrogen (N) ?

My answer is arsenic (As) is that right?

A solution is prepared by adding 16 g of CH3OH (molar mass 32 g) to 90 g of H2O (molar mass 18 g). The mole fraction of CH3OH in this solution is closest to which of the following? (A) 0.1 (B) 0.2 (C) 0.3 (D) 0.4 (E) 0.6

Both nuclear fusion and nuclear fission reactions a. release radioactive waste. b. involve the splitting of atoms. c. are utilized in nuclear power plants. d. release large amounts of energy.

Name the only satellite which is known to have an atmosphere in the planet it orbits

Kwame wants to measure the volume of water contained in a disposable foam coffee cup. Which units should he use?

What is the mass of 4 moles of C2H6O?

A diatomic gas has the molar mass of 38.00g/mol. what is the possible formula?

Which of the following is the final concentration of KCl if 500 ml of 0.25 M KCl is diluted to a final volume of 5 L? 0.025 L 0.0025 L 25 L 2.5 L

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?

When a radioactive decay occurs what is released? A. Only protons and neutrons B. Only electrons C. Protons/Neutrons, beta particle, gamma ray D. Only gamma rays