Which statement best describes elements?

A. They are the smallest particles of any material.

B. They are composed of only one type of atom.

C. They are the most expensive materials on earth.

D. They break down easily

What happens when human blood contains too many bases? A. Hydrogen ions from bicarbonate ions react with the bases. B. Water molecules break down to produce protons to react with the bases. C.

Identify the person who made the correct statement. Mike said petrified fossils are hard and heavy like rock. Bobby said that petrified fossils have the same appearance as when they were alive. Neither Mike nor Bobby is correct. Mike is correct.

The compound formed between lithium and nitrogen would be which of these letter choices? A. Li3N B. LiN3 C. LiN D. Li3N3

The sign of δ g predicts whether the formation of the products in a reaction is favored. if the value is positive, the formation of the products in a reaction is:

Which of the following is the correct chemical formula for Na and S? Na2S NaS2 NaS

What needs to happen for a solute to dissolve in a particular solvent? A) the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Which is a conversion factor for this statement of equality: 12 in. = 1 foot? 12 feet1 in. 12 feet 1 in. 1 in. 12 feet 1 in. 12 feet 1 foot12 in. 1 foot 12 in. 1 foot1 in. 1 foot 1 in.

Which of the following is an incorrect way of rearranging the density formula: a. m=v•d b. V=d/m c. V=m/d d. Both a and b are incorrect

Describe how the periodic table differentiates between metals and nonmetals. I need a very informative description/explanation on this.

When the ideal gas law is arranged as shown below, what property of the gas is being solved for (represented by the X) ? x equals PV over nR