Limestone tends to form natural caves to which of the following?

a. its tubular structureb. its sedimentary naturec. its chemical compositiond. its porous and nonporous layers

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.