Why would an element be abundant in the Earth’s crust, but not be very abundant in...
Why would an element be abundant in the Earth’s crust, but not be very abundant in the ocean? What is one example of an element of this nature? How might its position in the Periodic Table relate to its abundance in the ocean?
Homework Answers
Minerals are elements or compounds that occur naturally in the Earth’s crust. Rocks are mixtures formed of minerals. Just as elements are the building blocks of minerals, so minerals form the building blocks of rocks. More than 90% of the Earth's crust is composed of silicate minerals, which is made up of silicon element. Since the oceans are mostly water, the elements hydrogen and oxygen are the most common. Sodium and chlorine are found in the salt in ocean water.
e.g. Silicon (present about 28% by mass)
Hydrogen ion concentrations, often expressed as pH = -log10(H+), are controlled by respiration and photosynthesis, which alter the carbonic acid concentration in seawater. There is a strong correlation between oxygen and pH, therefore.
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Why would an element be abundant in the Earth’s crust, but not
be very abundant in...
Using the periodic table, which isotope is probably the most abundant isotope of potassium (K)? 41 K 39 K 38.10 K 19 K...
Using the periodic table, which isotope is probably the most abundant isotope of potassium (K)? 41 K 39 K 38.10 K 19 K 40 K Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, Li (atomic mass = 6.015121 amu) and 7Li (atomic mass 7.016003 amu). What is the percent abundance of lithium-6? You should use the periodic table to help you answer this. 7.5% 92.5% 86.7%...
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1. (0.5 pt) Why do you think there are no electronegativity values for the noble gases?...
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You read in a newspaper that the owners of capital in a particular country are urging...
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in what type of company would you chose the periodic-order-quantity rule of lot sizing and why?...
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3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be...
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Using the periodic table, which isotope is probably the most abundant isotope of potassium (K)? 41 K 39 K 38.10 K 19 K 40 K Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, Li (atomic mass = 6.015121 amu) and 7Li (atomic mass 7.016003 amu). What is the percent abundance of lithium-6? You should use the periodic table to help you answer this. 7.5% 92.5% 86.7%...
1. (0.5 pt) Why do you think there are no electronegativity values for the noble gases? 2. (0.5 pt) What are the three most electronegative atoms on the periodic table? 3. (1 pt) What type of bond (covalent or ionic) would you expect to form between an atom with a very high electronegativity and an atom of very low electronegativity (maximum difference in electronegativity between atoms)? Explain and give an example. 4. (1 pt) The Periodic table below shows the...
You read in a newspaper that the owners of capital in a particular country are urging their government to restrict trade through import quotas. What might you infer about the relative factor abundance in that country? Why? Explain how the production-possibilities frontier of the unified Germany might differ from the PPF of the former Federal Republic of Germany (West Germany), keeping in mind that West Germany, in the two-factor context, was generally considered relatively capital abandant and the German Democratic...
3.2 Periodic trends 1. (0620-5 2012-Paper 1/2-Q21) Which properties of the element titanium, Ti, can be predicted from its position in the Periodic Table? forms coloured compounds conducts electricity when solid can be used has low density as a catalyst X A X X Xx 2. (0620-W 2012-Paper 1/1-Q20) The diagram shows an outline of the Periodic Table. U V W X Y Which of the elements U, V, W, X and Y would react together in the ratio of...
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