Argon and Calcium both have an atomic mass that rounds to 40, but they have different atomic numbers. What are the differences between the two atoms, based on the information given?

What happens to an object that is foating in the ocean

5. A vitamin contains 1.5 x 10' grams of zinc. How many moles of zinc are in the vitamin?

In an oil spill, why does the oil not mix with the sea water? A. Lipids are hydrophobic B. Lipids are hydrophilic. C. Lipids are saturated. D. Lipids are unsaturated.

When comparing the colors of the following four compounds, which is most likely to appear green? [Co (CN) 6]3 - [Co (H2O) 6]3 + [Co (en) 3]3 + [CoI6]3 - and why?

How many moles are present in 2.45E23 moles of carbon tetrahydride

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?

Which elements can react to produce a molecular compound?

Who created the periodic table and in what year?