Which statement is true ? ( only one answer)
A) electrons are larger than protons
B) atoms are the smallest living organism
C) the number of protons in a atom determines the element
A is not true, protons are much heavier and larger than electrons and have a positive charge. B is not true, atoms are not living organisms. Your answer is C, the number of protons in an atom determines the element. It is called the Atomic Number.