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Atoms can form a variety of bonds with other atoms. Examples of bonding types include ionic, covalent, and metallic.
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Element First IE Second IE Third IE Electronegativity
$Al$ 580 kJ/mol 1820 kJ/mol 2740 kJ/mol 1.5
$C$ 1100 kJ/mol N/A N/A 2.5
$H$ 1310 kJ/mol N/A N/A 2.1
$B$ 800 kJ/mol N/A N/A 2.0
$F$ 1680 kJ/mol N/A N/A 4.0
$Mg$ 735 kJ/mol 1450 kJ/mol N/A 1.2

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Based on the information in the table above, which of the following substances is composed of ionic bonds?

A

$Al$

B

${CH}_{4}$

C

$B{F}_{3}$

D

$Mg{F}_{2}$

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