Light travels at 299,792 kilometers per second making it the fastest thing out there but the question I have is how did light exist when there was only darkness
Elements are grouped into periods and groups . Elements with same number of energy shells are in the same period and elements with the same number of electrons in the outermost energy shells are in the same group.
Reactivity depends on the number of valence electrons. Number of valence electrons the element has will determine if the element needs to gain electrons or give out electrons.
Therefore elements with same number of valence electrons will have similar chemical properties .
When you look at elements in the same group(column) they have similar chemical properties
The reason you are holding on to that might be because you have hope that this person who left you might come back. If they left you they aren't worth hoping for them to come back. This is a question that probably should be asked elsewhere but hope I can help.
Volume= length•width•height
V=5•7•3
V= 105cm^3
It’s halfway into the circle, you would need it when trying to find the circumference
