Which image shows the region of the periodic table which has the most reactive non-metal elements?

Granite forms when magma cools slowly, deep underground, into large crystals composed of the minerals quartz, feldspar, and mica.  How would granite be classified?  A photo of granite is shown below.

A mixture is made up of elements X, Y, and Z. A student performs a series of experiments on the substance and records his observations.  Which image represents the mixture?

How do we determine the number of neutrons in an atom?

Where is the majority of the empty space located in an atom?

Jim separates two materials (A and B) on the basis of some properties as shown in the table.  Which option correctly classifies the properties used to differentiate the materials?

Study chemical equations 1 and 2.  Which statement is true about the two reactions shown?