WebThe properties of group 7 elements. Group 7 elements are known as the halogens. Properties of the halogens: They are diatomic (travel in pairs, i.e Br2) They are coloured vapours at room temperature: Fluorine is a poisonous yellow gas; Chlorine is a poisonous green gas; Bromine is a poisonous brown liquid or orange gas. WebGroups and Periods. You may notice that the table is labelled, with groups across the top and periods along the side. There are 8 groups and 7 periods, and each atom is assigned to a group and to a period. For …

Diatomic molecule - Wikipedia

WebThe Halogens. Group 7 of the periodic table is home to the Halogens. They are non-metals. They consist of molecules made up of two atoms (diatomic molecules). They react with metals to form ionic compounds where the halide ion has a charge of -1. They form molecular compounds with non-metals. They form hydrogen halides, which dissolve in … WebAug 15, 2024 · The example coming up should make that clear. Suppose you had 123 typical atoms of boron. 23 of these would be 10 B and 100 would be 11 B. The total mass of these would be (23 x 10) + (100 x 11) = 1330. The average mass of these 123 atoms would be 1330 / 123 = 10.8 (to 3 significant figures). 10.8 is the relative atomic mass of boron. candy crush saga level 7459

Physical properties of the group 7 elements - Periodic table of ...

WebElements are arranged into groups with similar properties. Groups are numbered from 1 to 7, then 0. In the periodic table, metals are on the left of the stepped line, and non-metals … WebSub-index GCSE notes on the Group 7 Halogens. 1. ... The elements all exist as X 2 or X–X, diatomic molecules where X represents the halogen atom. A more reactive halogen can displace a less reactive halogen from its salts. A halogen displacement description. WebSep 28, 2014 · List of the 7 Diatomic Elements. The following 5 element gases are diatomic molecules at room temperature and normal pressure: Hydrogen – H 2. … fish to eat for high cholesterol