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kari74 [83]
3 years ago
12

Can someone help me with these. I don’t understand how to answer them or do the work

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
6 0
How am I supposed to help you if there's not picture of what the problem is
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Why does silicon have a high melting point
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What is responsible for the larger size of an anion in comparison with the atom from which it is form?
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electron-electron repulsion

Explanation:

When electrons add into valence shell of neutral elements, the element assumes a negative oxidation state. With this, the number of electrons having (-) charges will be larger than the number of protons having positive (+) charges. As a result, the extra electrons repel one another (i.e., like charges repel) and a larger radius is the result.  

In contrast, when cations are formed, electrons are removed from the valence level (oxidation) producing an element having a greater number of protons than electrons. The larger number of protons will function to attract the electron cloud with a greater force that results in a contraction of atomic radius and a smaller spherical volume than the neutral unionized element.    

To visualize, see attached chart that shows atomic and ionic radii before and after ionization of the elements.  

Download pdf
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Why do elements that make positive ions occur on the left side of the periodic table while those that make negative ions occur o
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