True, The atomic number is also known as the proton number., The mass number equals protons plus neutrons inside one nucleus., All atoms of one chemical element share the same atomic number., In a neutral atom, the count of protons is equal to the count of electrons., An isotope is one type of atom belonging to a chemical element., Carbon‑12, carbon‑13 and carbon‑14 are isotopes of the chemical element carbon., Every isotope of carbon has six protons inside its nucleus., Isotopes of a chemical element have identical atomic numbers but different mass numbers., Isotopes of a chemical element have the same number of protons and different numbers of neutrons., Chemical properties depend on the number and arrangement of electrons of an atom, Different isotopes of the same chemical element have the same chemical properties., The isotope carbon‑12 contains six neutrons in its nucleus., The isotope carbon‑13 has seven neutrons inside its atomic nucleus., The isotope carbon‑14 has eight neutrons inside its atomic nucleus., Isotopes of a chemical element react with other substances in exactly the same chemical way., False, Atomic number is the sum of all the neutrons inside an atom., Mass number is calculated by adding protons and electrons together., Atoms with different atomic numbers can still be atoms of the same chemical element., Neutral atoms always have more protons than electrons., The isotopes of carbon‑12, carbon‑13 and carbon‑14 have different numbers of protons., Isotopes of a chemical element have different atomic numbers but equal mass numbers., Isotopes of a chemical element differ from each other in the quantity of protons they contain., Chemical properties of an atom are controlled mainly by neutrons., Isotopes of a chemical element have totally different chemical properties., The isotope carbon‑12 has twelve neutrons inside its nucleus., The isotope carbon‑14 has fourteen neutrons inside its atomic nucleus., Isotopes of a chemical element always show large differences in how they take part in chemical reactions., A chemical element can have atoms with different number of protons., Mass number is another name for atomic number.

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