Circle the letter in front of the correct response. Which of the following statements is true. The mass of a carbon-12 atom is 12g exactly.
All atoms have neutrons.
All atoms of the same element are identical. None of the above. K 2 Cr 2 O 7 has moles of ions. Select the pair in which nitrogen has the same oxidation number. HNO 3 and HNO 2 d.