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What is the name of #Co_3N_2#?

Answer 1

Henry Antrim

Cobalt nitride. or Cobalt +2 nitride.

In this compound, cobalt has a common charge of +2, and nitrogen has a common charge of -3.

The compound's common name would be cobalt nitride.

The compound should be referred to as tri Cobalt di nitride or Cobalt +2 nitride, for even greater precision.

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Answer 2

Mateo Aguilar

The name is cobalt(II) nitride.

Cobalt is in the #"d"#-block of elements, so it is a transition metal.

Here are the steps for deriving the name of a compound of a transition metal.

Step 1. Write the name of the transition metal

This gives: "cobalt".

Step 2. Add the name of the nonmetal with the ending "-ide"

This gives: "cobalt nitride".

Step 3. Use the charge on the non-metal to find the charge on the transition metal

Each #"N"# needs three electrons to complete its octet.

Thus each #"N"# ion has a charge of -3, and the total charge on the two #"N"# ions is -6.

∴ The total charge on the three #"Co"# ions is +6.

Hence, each #"Co"# ion has a charge of +2.

Step 4. Write the charge on the non-metal as Roman numerals in parentheses immediately after (no spaces) the name of the metal.

This gives the name: cobalt(II) nitride.

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Answer 3

Henry Antrim

Cobalt(II) nitride.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.