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Postby 305086803 » Tue Nov 05, 2019 3:59 am

2D.3 States: Which of these compounds has bonds that are primarily ionic?
A.) BBr3
B.) BaBr2
C.) BeBr2

Why is C not an ionic bond? Isn't Be a metal?


Kavya Immadisetty 2B
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Re: 2D.3

Postby Kavya Immadisetty 2B » Tue Nov 05, 2019 7:56 am

If you find the difference in electronegativity between Be and Br, it's 1.39. Generally, if the difference is less than about 1.5, it will show covalent character.

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Re: 2D.3

Postby KDang_1D » Tue Nov 05, 2019 3:23 pm

How would we know this without a table with values? I'm pretty sure they've said we shouldn't have to remember specific values.

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Re: 2D.3

Postby 105335337 » Tue Nov 05, 2019 3:40 pm

We would not need to memorize this. You find out the ionic character through the electronegativity difference. The difference between c is 1.39, and typically, anything equal to or less than 1.5 is determined to have more covalent character.

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