If there's a 15.5-second time delay between observed lightning and the sound of thunder, approximately how far away is the lightning? Choose one:
A. 5 km
B. 8 km
C. 1.4 miles
D. 2 km

a is the answer i believe.

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.

answerformal;