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Oct 10, 2012· Whilst entirely agreeing with "pisgahchemist" that all the electrons in a molecule belong to the molecule as a whole, and can no longer be allotted to any particular atom, it is very difficult to see how covalent bonding can be taught to 14-16 year olds without the use of something based on the dot-and-cross diagram, and I'm sure new text-books ...
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Nov 27, 2011· I was revising Chemistry when I came across this question: "Draw a 'dot and cross' diagram to show what happens to the outer shells of electrons when Potassium and Bromine react". So I drew Potassium with the electron configuration of 2,8,8,1. And drew Bromine with the electron configuration of 2,8,8,8,8,1. Then I don't know how Potassium can give up its spare electron when Bromine …
an expanded molecular formula showing the arrangement of atoms within the molecule. unshared pair. a pair of valence electrons that is not shared between atoms. double covalent bond. ... an electron dot structure such a H:H represents the shared pair of electrons of the covalent bond by two dots.
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Question about CaBr2 dot cross diagram...help please! Watch. ... If you write down Ca's electron configuration as 2,8,8,2..it's easy to see how it will become 2+ by giving each Br an electron. 1. reply. gingerbreadman85 ... p and d shells and their relative energy levels. dot cross diagrams just dont work for Bromine.
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Jun 11, 2015· General Chemistry. A Free Online Textbook. A three-dimensional representation of an atomic 4f orbital. About General Chemistry. General Chemistry is an introduction to the basic concepts of chemistry, including atomic structure and bonding, chemical reactions, and solutions. Other topics covered include gases, thermodynamics, kinetics and equilibrium, redox, and chemistry of the elements.
C2.1 Structure and Bonding & C2.2 How structure influences the properties and uses of substances. STUDY. PLAY. ... Draw a dot and cross diagram to show the bonding in a water molecule. ... In bromine, each molecule is held together by strong covalent bonds but the forces between these molecules are weak.
(a) Draw a dot and cross diagram to show the covalent bonding in a molecule of ethene. Only the outer electrons in each atom need to be shown. (2) (b) Compound X is made from ethene and is used in cars to prevent the engine coolant from freezing in cold weather. (i) Compound X contains 38.7% carbon, 9.7% hydrogen and 51.6% oxygen by mass.
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Jun 12, 2017· Bromine is in the seventh group of the periodic table, the halogens, so it has seven valence electrons. In order to represent, we simply write "Br", the chemical symbol of bromine and draw a circle around it with seven dots, each dot representing one valence electron.
The orbital diagram for bromine shows four concentric circles around a dot representing a nucleus, with two dots on the first circle, eight on the second, 18 on the third and seven on the fourth. Each dot on a circle represents an electron. The four concentric circles represent the four energy levels in which the electrons of a bromine atom sit.
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Nov 02, 2013· I am suppose to draw the dot and cross diagram for " a hydrogen bromide molecule" and also "a hydrogen sulphide molecule" I know how to do dot and cross diagram and I have done other questions, im just stuck on these two. so please don't give me a video to show me how to do covalent bonding I just need someone to explain these two to me . thank youuu :)