In his observation, he notices that the hydrogen atom only emitted light of a fixed wavelength. He was able to discover that the electrons only orbit the nucleus of the atom at discrete orbits. When the electron ‘jumps’ from a higher to lower level orbit, it emits a wavelength. These wavelengths are unique to atoms of an element and can be used to identify them hence he led the way to the establishment of the light spectrum.
To answer this question I would have to know the elements in the compound
Answer:
C. Lose three electrons to have a full outer shell
Explanation:
Al is in Group 13 of the Periodic Table, so it has three valence electrons.
It must either lose three electrons or gain five to achieve a stable octet.
It is easier to lose three electrons than it is to gain five, so Al loses three electrons.
D. is wrong, for the same reason.
A. is wrong. If Al lost three electrons, it would be breaking into a stable inner shell.
C. is wrong. Al is a metal, so it will lose electrons in a reaction.
Answer:
Explanation:
1. First balance the equation for the synthesis of cryolite:
2. Find the limiting reagent between the 
and 
- First calculate the number of moles of each compound using its molar mass and the mass that reacted completely:
- Divide the number of moles obtained between the stoichiometric coefficient of each compound in the chemical reaction:
The 
is the limiting reagent because it has the smallest number.
3. Find the mass of cryolite produced:
