Answer:
Geosphere
Explanation:
Geosphere sometimes called as lithosphere starts from the surface of the earth and lies till crust. This part of the earth contains rocks and minerals.
This portion of the earth includes sediments,mountains and rock. The natural resources that is available to the human brings lies in geosphere.
I think the correct answer from the choices listed above is option 3. It is the compound Silver bromide that is insoluble to water. It has a very low solubility which is approximately 0.14 milligram per liter of water. Hope this answers the question. Have a nice day.
Answer:
7.71x10^23 molecules
Explanation:
Avogadro's # = 6.022x10^23
1.28 mol SiO2 x 6.022x10^23/ 1 mol SiO2 = 7.71x10^23 molecules
Answer: Option (D) is the correct answer.
Explanation:
Atomic number of chlorine is 17 and its electronic distribution is 2, 8, 7.
So, in order to attain stability it tends to gain one electron from a donor atom. Therefore, a chlorine ion is formed as .
As it gains only one electron that is why, -1 charge occurs.
Whereas Ar is a noble gas with atomic number 18. As it has completely filled octet so it will be unreactive in nature as it is already stable.
Similarly, He is also a noble gas so it is unreactive in nature.
Atomic number of boron (B) is 5 with electronic distribution 2, 3. So, in order to attain stability it needs to lose 3 electrons.
Thus, we can conclude that Cl is the atom which tends to gain 1 valence electron from another atom in order to become stable.