Isotopes Atoms of the same element with different numbers of neutrons.
Where more than one isotope exists, the value given is the abundance weighted average. This is approximately the sum of the number of protons and neutrons in the nucleus. The mass of an atom relative to that of carbon-12. You cannot have carbon with seven protons. So by definition, hydrogen has one proton, helium has two protons, carbon has six protons. And the atomic number is, literally, just the number of protons in the element. The number of neutrons in an atom can be determined by the difference between the atomic. Therefore, a vanadium atom has twenty-three protons and twenty-three electrons. The atomic number of an element is equal to the number of protons and electrons in that element. Vanadium is the 23rd element of the periodic table so its atomic number is 23. Calculate the number of protons, neutrons and electrons it contains. The atomic number of a sodium atom is 11 and its mass number is 23. If an element had 9 protons, it would not be oxygen, but an element can have 8 protons, and 9 neutrons and still be considered oxygen we call this an isotope.
This is because each element has a certain number of protons. So, if an unidentified element has 8 protons, then it is oxygen. The atomic number is the number of protons an element has. Weegy: Isotopes are atoms of the same element with the same number of protons and a different number of NEUTRONS. User: An isotope of an element has the same number of protons but a different number of _.
Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a chemical element – a substance that contains only one type of atom. Oxygen 17 has nine neutrons, and oxygen 18 has 10 neutrons. All of these isotopes have eight protons, but oxygen 16 also has eight neutrons. Oxygen has three major isotopes: oxygen 16, oxygen 17, and oxygen 18. Click here for a transcript of the Stable Isotopes I video. Since the number of electrons is responsible for the chemical behavior of atoms, the atomic number identifies the various chemical elements.