1) Isotopes of an element have a) the same number of protons, but different number of electrons b) the same number of protons, but different number of neutrons 2) Isotopes of an element have different a) mass number b) atomic number 3) Isotopes of an element have  a) different chemical properties b) the same chemical properties 4) Isotopes of an element have a) different physical properties b) the same physical properties 5) Which of these are NOT isotopes? a) Carbon-12 and Carbon-13 b) Hydrogen-1 and Helium-2

MODULE 3. LESSON 3. ISOTOPES RECALL

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