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Posted: Tue Nov 05, 2019 3:59 am
by 305086803
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?


Re: 2D.3

Posted: Tue Nov 05, 2019 7:56 am
by Kavya Immadisetty 2B
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.

Re: 2D.3

Posted: Tue Nov 05, 2019 3:23 pm
by KDang_1D
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.

Re: 2D.3

Posted: Tue Nov 05, 2019 3:40 pm
by 105335337
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.