Electrons orbit around the nucleus of atoms in allowed energy states. This is the basis of the theory of which scientist?

A. John Dalton

B. Niels Bohr

C. Albert Einstein

Meteorology is best defined as the study of

This is done to regulate materials that enter earth's atmosphere due to any type of combustion. materials that are regulated include carbon dioxide, carbon monoxide, sulfur oxides, nitrogen oxides, hydrocarbons, and particulates.

how have seals, penguins, and small baleen whales of antarctic waters benefited from the decline of large baleen whales?

Which of the following why use approximately represent the number of atoms in one mole of gold A. 3.26 x 1026 B. 2.30 x 106 C. 12.04 x 1024 D. 6.02 x 1023

An example of a heterogeneous mixture is

An aqueous solution is made from a molecular compound rather than from an ionic compound. If some ions are present in solution, which best describes the solute? A. a weak electrolyte B. a nonelectrolyte C. a strong electrolyte D.

Which of the following measures the radiation given off by atoms per second?

What is the name of the outermost layer that forms a boundary around the outside of each cell

What does an ionic compound form?

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?