ErinWeeks
Write the formula obtained when this atoms loses or gains valence electrons and becomes an ion. Tell whether it is a cation or an anion. Be



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him1618
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Atomic number for Be?

ErinWeeks
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i guess i dont know

him1618
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ITs 4..that means the valence shells ar filled like K=2 L=2

him1618
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now L can hold 8 electrons....so the closest stable configuration would be K=2 L=0

ErinWeeks
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what would the formulas be?

him1618
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It loses 2 electrons so its Be 2+

ErinWeeks
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okay so is it a cation or anion?

him1618
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Cations are always +ve...so this is a cation ok?

ErinWeeks
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okay so cation is positive and anion is negative right?

him1618
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yup

JTfan2000
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B2 anion