The shape of a molecule is tetrahedral. How many lone pairs are most likely on the central atom?

zero

two

three

four

What were the results on Rutherford's goldfoil experiment

What does it tell you if it is a ph of 7?

Groups of cells that work together to do a specific job

Alkali and alkaline earth metals are not reactive.

Which statement describes an alternate theory of acids and bases? (1) Acids and bases are both H + acceptors. (2) Acids and bases are both H + donors. (3) Acids are H + acceptors, and bases are H + donors.

What is the oxidation number for Our in NaHCO3?

To determine if a reaction is exoteric a student should use

Which of the following are physical properties of a penny? Choose all that are correct. Select one or more:a. Slightly red in color. b. Conducts electricity very well. c. Reacts to oxygen when heated. d. Resists corrosion from most acids.

NO2 and N2O4 undergo the reaction shown. When a sealed container of NO2 reaches chemical equilibrium, which must be true? A) No N2O4 is present. B) No chemical reactions are occurring. C) The rates of the forward and reverse reactions are equal.

What differences did you notice in the different states of water