The two are potassium and rubidium. Why? Na is an alkali metal. As you go down the metals become more reactive.
Calcium has 20 protons. Why? The atomic # is 20 (the one at the top).
It has 20 neutrons. Why? The atomic mass (the number on the bottom) is ~40, ignoring electron mass. 40- 20 protons = 20 neutrons.
It has 20 electrons.
Why? The # of protons and electrons is the same. Ions aren't on the periodic table.
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Muscle cramps, fatigue, headaches, decreased ability to excrete toxins/waste from the body or carry nutrients throughout the body dryness, wrinkles, etc
Answer:
In my opinion, it would be A, B, D, and G. Latitude because of the location of where you are, elevation to determine how cold it is. Air currents so you know if its windy or not. Lastly, proximity to water, due to the fact that you can get rain because you're closed to the water.
Explanation:
Liver cell will divide slowly if the part of the liver remove cells, liver cells continues until to divide until the liver reaches its former size
