In a solar system, there is a sun that is in the middle and has planets orbiting around it. The same way, the nucleus is in the middle with electrons orbiting the nucleus. <span />
<span>The Correct answer is not shown. The correct answer would have to say Atom A has one proton than Atom B because in the question it says Atom A has an atomic number of 19 and Atom B has an atomic number of 20.</span>
"The density of a substance determines how much light is refracted"
Hope this helps :)
Answer:
i think b and c. but not sure what the third is? only 70% sure.
Explanation:
