Acalcium atom tends to lose two electrons to become a calcium ion, while a chlorine atom tends to gain one electron to become a chloride ion. given this information, write out the chemical formula for the compound calcium chloride.

CaCl2.

Explanation:

Ions may be defined as the elements that acquires positive or negative charge over them. Two main types of ions are cations and the anions that are formed by the gain or loss of the element.

The calcium has two positive charge over it and contains Ca²+. The chloride contains one negative charge over it and exists as .

The chemical formula will be :

Ca²+     .

+2               -1  (cross multiply)

CaCl2.

Thus, the formula is CaCl2.

The formula for the calcium chloride compound would be CaCl2.

Calcium in its neutral state has no charge but when it loses two electrons, it becomes calcium ion ()

Chlorine atom, also in its neutral state, has no charge. When it  gains one electron, it becomes chloride ion ()

When both calcium and chloride ions interact in a chemical reaction, the  donates the two electrons to two chloride ions. Each of the two chloride ions gains 1 electron from the calcium ion. Thus, a neutral   is formed

+ ---->

Because the bond between the calcium ion and the two chloride ions is formed through the donation of electrons by the calcium ion,  is said to be an ionic compound.

More on chemical formula can be found here:

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]

b. lithosphere, asthenosphere, mesosphere   is the answer most likely