How do hydrogen and oxygen atoms form covalent bonds to create water? A: Oxygen gives its electrons to hydrogen. B: Hydrogen giv
2 answers:
<u>Answer:</u> The correct answer is Option C.
<u>Explanation:</u>
Covalent bond is formed when there is sharing of electrons between the atoms that are forming a bond.
When hydrogen and oxygen form a covalent bond to form a compound named water, both the atoms share electrons with each other.
Electronic configuration of Hydrogen =
Electronic configuration of Oxygen =
As, 2 electrons are required for one oxygen atom to complete its octet and 1 electron is required by the hydrogen to have a stable configuration. Therefore, 2 atoms of hydrogen shares its electrons to 1 atom of oxygen to form water.
The chemical formula for water is .
Hence, the correct answer is option C.
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The quantity with units of length only is
Explanation:
We have to combine the following constants:
- , Planck constant, with units
- G, the Newton's gravitational constant, with units
- , the speed of light, with units
The combination of these constant should have units of length only, so with meters (m).
First, we notice that has [kg] in its units, while G has
in its units, so in order to make the [kg] disappear, we have to multiply them and they should have same power, so:
Now we have to make the seconds, [s], disappear. We do that by dividing the new quantity by , so that the new units are:
We are almost done: now the quantity has units of an area, squared meters. Therefore, in order to make it have it units of length, we just take its square root:
Learn more about gravitational constant:
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