Answer:
The answer is 3:2
Explanation:
A cubic cell has 6 sides
= 6 side²
= 6 × 4²
= 6 × 16
= 96 mm²
Volume of a cubic cell
= side³
= 4³
= 64 mm³
The ratio of the surface area to volume of imaginary cubic cell is therefore:
= 96/64
= 3/2
= 3:2
Answer:
A
As sand cannot hold the heat for long, it gets cooler as soon as the sun sets
Answer: Option (D) is the correct answer.
Explanation:
Non-metals are electron deficient in nature so, in order to complete their octet they need to gain electrons from metals or electron rich atoms.
Whereas metals are electron rich in nature so, in order to gain stability metals lose their valence electrons.
For example, atomic number of potassium is 19 and its electronic distribution is 2, 8, 8, 1. Whereas atomic number of chlorine is 17 and its electronic distribution is 2, 8, 7.
Therefore, sodium in order to gain stability will lose its valence electron to chlorine atom. Hence, an ionic bond will be formed resulting in the formation of KCl.
Thus, we can conclude that non-metals seek to gain electrons to have full outermost shells, while metals seek to lose electrons to have full outermost shells.
