A carbonated beverage is a heterogeneous mixture.

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

Which is an observation?

Which of the following diagrams represents a solution?

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?

A manganese (III) ion forms when a manganese atom:

Which is a noble gas?