What are the vertical columns called on the Periodic Table? group
period
row
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Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

What is a difference between a mixture of elements and a mixture of compounds

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.