The sun warms the Earth unevenly." This statement is scientific because: A)it is a fixed thought, not subject to change.
B)it has a logical, experiment-based explanation.
C)it is a known fact.
D)it cannot be proven by experiments.
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where's the diagram?

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.