2 atoms of Al
3 of S
4*3=12 of O
so total= 17
Answer:
The source of the hydrogen is coming towards us.
Explanation:
The wavelength of the hydrogen is decreasing as it goes from 486.1 nm to 486.0 nm.
<u>The wavelength of a wave is directly proportional to the distance between the observer and the object.</u>
For example, when the observer is far from the source, the observer will observe a longer wavelength which corresponds to red color if it is in the visible region.
<u>As the wavelength is decreasing that means that the hydrogen particle ( source may be a star) is coming towards the observer.</u>
Thus, we can conclude that the source of the hydrogen is coming towards us.
It is a single replacement reaction. Li and Mg switch places.
Answer:
Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions.
Explanation:
It's NF3 (one Nitrogen and 3 Flouride)