You should know how many electrons fit in each shell.
K 2
L 8
M 2
You can fit 8 electrons in the M shell but after filling up the first shells, there are only 2 electrons left. This means that there are 2 valence electrons.
To melt a solid, energy must be input into the solid to give the molecules high energy to disrupt the lattice bonds and change phase. To return the liquid to solid, the same amount of energy used in melting is required to be removed from the liquid, ideally. This is assuming there is no loss of energy in the process.
Answer:
Freezing does not affect the mass of Juice because mass is constant and only the volume increases.
Explanation:
Freezing does not affect the mass of liquid and only volume increases, because when liquid freezes, the molecules stick together in hexagonal form and then expand, the mass remain constant and it's volume increases when it is frozen and become solid which signify that when there is increase volume, frozen juice is less dense than liquid juice.
Answer:
2
Explanation:
The coefficient for O is 2 and this is an example of a combustion reaction. With the help of the coefficient 2 infront of oxygen, this equation now demonstrates law of conservation of mass.