Answer:
The third box from the left hand side
Explanation:
A sleet is a form of precipitation in which water reaches the surface in a frozen state or in form of ice.
Sleets are common occurences in the temperate region.
If we trace the material circled by the third box from the origin, we would be able to provide an explanation that perfectly fits how sleets forms.
Water in the cloud is in a supersaturated frozen form. As the water encounters warm air, the freeze melts to water. As the water comes down and approaches the surface, it encounters a cold air front which immediately freezes the melt water. This is the sleet that reaches the surface.
The first and second box from the left hand side is rain droplet. The last box is snow flakes.
Answer:
Dinitrogen tetroxide, commonly referred to as nitrogen tetroxide (NTO), and occasionally (usually among ex-USSR/Russia rocket engineers) as amyl, is the chemical compound N2O4.
Answer:
I definitely think he mostly observed that it was clear in color.
Explanation:
Physical. chemical only applies when it undergoes a reaction
Answer:
A positive and negative ion.
Explanation:
Ionic bond:
It is the bond which is formed by the transfer of electron from one atom to the atom of another element.
Both bonded atoms have very large electronegativity difference.
The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.
For example:
Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion. Sodium have one valance electron while chlorine have 7 valance electrons. In order to complete the octet chlorine require one electron while sodium need to lose its one electrons. That's why when both atom combine sodium lose its electron and becomes positive ion i.e cation while chlorine accept its electron and becomes negative ion called anion and bond between them is ionic bond.
