Answer:
Explanation:
-Octet forms when the valence electrons are gained, lost or shared.
-In order to become stable, which has 8 valence electrons (octet), nonmetal groups such as group 17, needs to gain 1 more electron to become 8/ octet.
When gaining that 1 electron, group 17 elements become negative ion or anions
-For metal groups such as group 1, they need to lose that 1 electron to become stable. When they lose that 1 electron, they become positive ion which is cation.
Hope this helps
Answer:
Pangaea
Explanation:
The chemical formula for quartz is SiO_2
The chemical formula for quartz is SiO_2, which represents one silicon atom and two oxygen atoms in each formula unit.
Quartz is composed of silicon (Si) and oxygen (O) atoms bonded together in a specific arrangement. Its chemical formula, SiO2, represents this composition.
In quartz, each silicon atom is bonded to two oxygen atoms, and each oxygen atom is bonded to one silicon atom. This arrangement forms a three-dimensional network structure, making quartz a crystalline mineral.
The chemical formula SiO_2 provides a precise representation of the elements and their ratios in quartz.
Silicon and oxygen are the two elements that make up the mineral, and they are combined in a 1:2 ratio, meaning that for every silicon atom, there are two oxygen atoms.
This ratio is essential for understanding the stoichiometry and structure of quartz.
Quartz has various applications due to its unique properties, such as its hardness, transparency, and ability to transmit certain wavelengths of light, making it valuable in electronics, optics, and various industrial processes.
Learn more about Chemical formula for quartz here:
#SPJ1
Answer: Option (d) is the correct answer.
Explanation:
It is known that sea water contains a large amount of common salt, that is, sodium chloride (NaCl). This salt is basic in nature.
Since, it is also known that species which have pH equals to 7 are basic in nature. Species which have pH less than 7 are acidic in nature and species which have pH greater than 7 are basic in nature.
Hence, due to the presence of common salt in sea water its surface is basic in nature.
Therefore, we can conclude that the normal pH of surface sea water is 9.0.
Answer: B. lipids
Explanation:
When an individual has an energy surplus, the extra energy is stored in the body as lipids. Lipids are used for energy in the long term