A sled is lifted to a height of 20 m on the slope and the mass of the rider is 65 kg. If gravity is a constant at 10 m/s2 calculate the following GPE at the highest point (GPE = mgh).
If energy is conserved in a system how much KE would this same sled and rider have at the lowest point.
At what position on the hill would the sled and rider have exactly half the total amount of energy?

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

since electrons are negative the answer is neagtaive

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.