J. J. Thomson

A) Electrons are in orbital levels.

John Dalton

B) Atoms are the smallest unit of an element.

Ernest Rutherford

C) Electrons are scattered within the atom.

Niels Bohr

D) Protons are at the center of an atom.

How many particles are in 12.47 grams of NaCl?

Which is most likely the goal of selective breeding on a farm

Suppose you want to do an experiment to hear how three different objects with sound when dropped from the same distance. You drop a pebble, a rock, and a grain of sand. What are the variables of your experiment?

Which are assumed to be constant while using the combined gas law? pressure number of moles volume and moles of gas pressure and temperature

Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water. Suppose 63. g of octane is mixed with 59.4 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction.

In an endothermic reaction do the reactants or the products have the lower potential energy

What kind of nuclear reaction would result in the release of a beta particle

Determine the number of bonding electrons and the number of nonbonding electrons in the structure of xef2.

1. 1.204 x 1024 atoms He = ? moles He

How many atoms are in 35.1 g of sodium chloride (NaCl) ?