Which of the following best represents an isolated system?
A. The ocean
B. The moon
O C. The atmosphere
O D. Outer space

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

i think the answer would be b

answerscientific theory;