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if an atom has 16 protons, 12 neutrons, and 18 electrons, what is the atom's electrical charge?

a. +4

b. -6

c. -2

d. +6

explain and show how you got the answer, i don't get how to do these.

Several processes form metal ore. match each process to its description. volcanic activity weathering hydrothermal energy rocks break down as they interact with air and water. arrowright density differences and other factors cause metals to concentrate in igneous rocks. arrowright seawater heats up from contact with hot rock, and metals dissolve in it. the water rises and contacts cooler water, causing metal ores to settle on the ocean floor. arrowright

What is the mass of the same rock on the earth

How many neutrons does plutonium -196 with an atomic number of 78.