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  1. جميع تمارين الموجات الواردة في الإمتحان الوطني من 2008 إلى 2020 لمادة الفيزياء والكيمياء (ع.ف + ع.ح.أ + ع.ر) - خيار فرنسية

  2. All atoms of the same element have the same number of protons, but some may have different numbers of neutrons. For example, all carbon atoms have six protons, and most have six neutrons as well. But some carbon atoms have seven or eight neutrons instead of the usual six.

  3. 26 Ιουν 2024 · Study with Quizlet and memorize flashcards containing terms like Isotopes of carbon differ with respect to the number of, Elements in group 17 are called, Due to periodicity, which of the following elements has chemical behavior similar to that of Oxygen? and more.

  4. 27 Απρ 2023 · Isotopes of an element are atoms with the same atomic number but different mass numbers; isotopes of an element, therefore, differ from each other only in the number of neutrons within the nucleus.

  5. Isotopes are atoms of the same element that contain different numbers of neutrons. For these species, the number of electrons and protons remains constant. This difference in neutron amount affects the atomic mass ( A ) but not the atomic number ( Z ).

  6. Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s atomic number on the Periodic Table. For example, carbon has six protons and is atomic number 6.

  7. Isotopes are different forms of an element that have the same number of protons but a different number of neutrons. Some elements—such as carbon, potassium, and uranium—have naturally occurring isotopes.