Nov 23, 2020 · Group and period number of two elements are given. P – group 17, period – 3 Q – group 2, period – 3 a. Write the sub-shell electronic configuration of each. b Write the chemical formula of the compound formed by their combination. Answer: Answer: a. P – 1s 2, 2s 2, 2p 6, 3s 2, 3p 5 Q – 1s 2, 2s 2, 2p 6, 3s 2. b. Q is electropositive ...
Feb 22, 2007 · [Last Updated: 2/22/2007] Citing this page. If you need to cite this page, you can copy this text: Kenneth Barbalace. Periodic Table of Elements - Sorted by Ionic Radius.
Grade 11 Periodic Table and Elements. What element is in Group 2 and Period 4? You need to have at least 5 reputation to vote a question down.
Oct 20, 2020 · Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next. Within each column, or group, of the table, all the elements have the same number of valence electrons.
Electronegativity in the periodic table. Description of trend. The graph shows how electronegativity varies down group 2: as the atomic number increases, the Note that graphs will be watermarked. ×. Explanation of this trend. Going down group 2: the atomic radius increases … the outer electrons are...
Nov 29, 2014 · (6) An element which is used in making fluorescent bulbs and is second member of Group 18 in the Modern Periodic Table (7) A radioactive element which is the last member of halogen family. (8) Metal which is an important constituent of steel and forms rust when exposed to moist air.
The alkaline earth elements are metallic elements found in the second group of the periodic table. All alkaline earth elements have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found free in nature.