A carbonated beverage is a heterogeneous mixture.

A solution is a heterogeneous mixture.

Soil is a homogeneous mixture.

How many valence electrons are present in the element with the following ground state electron configuration?                                                                           1s2 2s2 2p3

Which of the following diagrams represents a solution?

Which is an observation?

Match the definition with the state of matter.

How many valence electrons are in an atom of magnesium in the ground state?

One isotope of carbon has the atomic number 6 and the mass number 14.  An atom of this isotope contains:

What is the correct name for CuCl2?