81. What element has the electron configuration 1s²2s²2pº3s 3p?

a. nitrogen

c. silicon

b. selenium

d. silver

Consider the titration of 30.0 mL of 0.050 M NH3 with 0.025 M. HCl. Calculate the PH after the following volumes of titrant have been added 0 ml 20 mL 59.1 mL 60.0 mL 71.4 mL 73.4 mL

Which of the following is a method used by atoms to form a chemical bond? Merging electrons Merging protons Sharing electrons Sharing protons

Using mass, describe the relative size of the subatomic particles

Which structural formula represents a linear nonpolar molecule containing two polar bonds?

Which of the following correctly describes the result of a voltage difference?

How would you present weight change if Earth had twice the mass that it does

Which types of orbitals are found in the principal energy level n = 4? A. S, d B. S, p, d, f C. S, p D. S, p, f E. S, d, f

Transport means to move something from one place to another. True False

What are two reasons that ocean water sinks in the Arctic Ocean? A. The surface water is warmer and less salty than normal. B. The surface water is warmer and more salty than normal. C. The surface water is colder and less salty than normal. D.

Which statement best describes the conductivity of weak electrolytes, such as weak acids and bases? A) Weak electrolytes do not dissolve in water and can not conduct electricity.