Geologists estimate that the Earth is 4.54 billion years old, based on:.a. radiometric dates on rocks from the Canadian craton. b. isotopic dating of meteorites from the first differentiated bodies of the Solar System. c. age estimates of Moon rocks. d. relative age dates on clastic zircons from Australia.

B. isotopic dating of meteorites from the first differentiated bodies of the Solar System.

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.