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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Answer:
Glucose: is a simple sugar which is an important energy source in living organisms and is a component of many carbohydrates.
Fructose: or fruit sugar, is a simple ketonic monosaccharide found in many plants.
Deoxyribose: sugar derived from ribose by replacing a hydroxyl group with hydrogen.
Ribose: is a kind of sugar that is produced by the body. It is used as a medicine. Ribose is used for heart disease, mental function, athletic performance, chronic fatigue syndrome (CFS), fibromyalgia, and many other conditions, but there is no good scientific evidence to support these uses.
Glyceraldehyde (glyceral) is a triose monosaccharide with chemical formula
Explanation:
Answer:
<em>In the lungs, the blood receives oxygen then leaves through the pulmonary veins. It returns to the heart and enters the left </em><em>atrium</em><em>.</em>
Convection drives the circulation of air in the earth's atmosphere.
<span>The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion. Green plants remove carbondioxide from the atmosphere by photosynthesis. Living organisms - including allplants and animals - release energy from their food using respiration.</span>
