Many elements make up the human body, but only three occur in abundance. These elements, oxygen, carbon, and hydrogen, combine to form the constituents of some of the most essential processes in the human body, such as cellular respiration. The remaining elements are also important, assisting ...
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Which of the following formed elements carry oxygen? a. leukocytes b. erythrocytes c. thrombocytes d. monocytes 1. The number of protons plus the number of neutrons is the element's ___ Which of the following are the smallest living units in...
What elements make up sodium hydroxide? Compound: When two or more different atoms combine, they can form a compound. There are different types of compounds, including ionic compounds, which are compounds made up of different ions (or charged atoms). Typically, metals lose an electron and becom...
What elements make up the mantle? Answer and Explanation: The major elements that make up the mantle are oxygen, silicon and magnesium. However, it includes other elements like aluminum, iron, calcium,... Learn more about this topic:
“Oxygen cycle, circulation of oxygen in various forms through nature. Free in the air and dissolved in water, oxygen is second only to nitrogen in abundance among uncombined elements in the atmosphere. Plants and animals use oxygen to respire and return it to the air and water as carbon dio...
第1题 The two elements water is made are oxygen and hydrogen.A、that B、which C、of which D、with which 第2题 The crime was discovered till 48 hours later,gave the criminal plenty of time to get away.A、which B、that C、so D、what 第3题 The International Studies University,in 1951...
Oxygen also plays a role in combustion. There are several ways to extract pure oxygen. Water can be ionized, forcing the oxygen and hydrogen atoms to separate. More commonly, however, samples of air are cooled into a liquid form and then slowly heated. As the air heats, elements ...
It must be composed of two or more different elements. The elements must combine chemically. The substance must have a consistent composition. If a substance doesn’t meet all of these qualities, it is not a compound. For example: Ozone (O₃) is a gas consisting of three oxygen atoms....
Early on during the hot Big Bang, there were only free protons and neutrons: no atomic nuclei. How did the first elements form from them?