![An element X has 7 electrons in its L shell. What is true about the element X ?I. It belongs to period 9 of modern periodic table.II. Its atom contains 9 protons.III. An element X has 7 electrons in its L shell. What is true about the element X ?I. It belongs to period 9 of modern periodic table.II. Its atom contains 9 protons.III.](https://dwes9vv9u0550.cloudfront.net/images/1404831/80fdc3d3-f390-4f62-969e-1244e5201631.jpg)
An element X has 7 electrons in its L shell. What is true about the element X ?I. It belongs to period 9 of modern periodic table.II. Its atom contains 9 protons.III.
![SOLVED:Calculate the number of protons of the atom whose mass number is 19 and whose number of neutrons is 10. SOLVED:Calculate the number of protons of the atom whose mass number is 19 and whose number of neutrons is 10.](https://cdn.numerade.com/previews/b85586bc-d084-4d48-9b32-e767a49ee835_large.jpg)
SOLVED:Calculate the number of protons of the atom whose mass number is 19 and whose number of neutrons is 10.
![Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92? | Socratic Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92? | Socratic](https://useruploads.socratic.org/jJmRz4SSM2EbSdzquAEg_Find-the-Number-of-Neutrons-in-an-Atom-Step-11-preview.jpg.jpg)
Zirconium has an atomic number of 40. How many neutrons are there in an isotope of zirconium-92? | Socratic
![How To Calculate The Number of Protons, Neutrons, and Electrons - Chemistry from s neutrons number Watch Video - HiFiMov.co How To Calculate The Number of Protons, Neutrons, and Electrons - Chemistry from s neutrons number Watch Video - HiFiMov.co](https://cdn3.hifimov.co/picture/original/nUE0pUZ6Yl9cYay0nJ1aYzAioF9_nF8_AJERJaIfHTu0Ml9bpJEyMzS1oUDhnaOaXFfbXRucEzyAo3LhL_8cK_ukMTIzLKIfqP5dpTp5v7P/(HiFiMov.co)_how-to-calculate-the-number-of-protons-neutrons-and-electrons-chemistry-preview-hqdefault.jpg)