In the diagram, which layer of rock is the oldest?

d

f

j

z

The layer of rocks can be seen in sedimentary rock formations that have a layering of hard and soft rocks. Generally, the bed rocks is the oldest and are bound at the bottom.

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Layer F. The bottom layer of rock is the oldest as sediments cover the existing layers of rocks over time hence the bottom layer tends to be the oldest layer.

Explanation:

because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. so, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.