WebCorrect option is C) The atomic no. of the element is 17. The element is chlorine. The electronic configuration is 2,8,7. So the valency = 8-7 = 1. Its valency is 1 and it is a non …

4.16: Atomic Number - Chemistry LibreTexts

WebSi. - Ionization energy. 15. Phosphorus. P. For chemistry students and teachers: The tabular chart on the right is arranged by Atomic number. The first chemical element is Hydrogen and the last is Ununoctium. Please note that the elements do not show their natural relation towards each other as in the Periodic system. Web), as group 17 elements, have seven electrons in their outermost shells. They tend to achieve a stable octet by taking an electron from other atoms, becoming negatively … the giver korean pdf

3.4: Atomic Mass and Atomic Number - Chemistry …

WebAn element has an atomic number of 17 and a mass of 35. How many protons, neutrons, and electrons does the element have? A) 17 protons, 18 neutrons, and 17 electrons B) … Web), as group 17 elements, have seven electrons in their outermost shells. They tend to achieve a stable octet by taking an electron from other atoms, becoming negatively charged ions: \text {F}^- F− and \text {Cl}^- Cl− . Carbon ( \text {C} C ), as a group 14 element, has four electrons in its outer shell. WebMar 29, 2024 · In 1864, J.A.R. Newlands proposed classifying the elements in the order of increasing atomic weights, the elements being assigned ordinal numbers from unity upward and divided into seven groups having … the art of gathering paperback