To identify the correct name for the compound [tex]\( Ca(NO_3)_2 \)[/tex], let's follow the standard approach for naming ionic compounds.
1. Identify the cation (positive ion) and the anion (negative ion):
- Cation: [tex]\( Ca^{2+} \)[/tex]
The symbol "Ca" represents calcium. It typically forms a cation with a +2 charge, denoted as [tex]\( Ca^{2+} \)[/tex].
- Anion: [tex]\( NO_3^- \)[/tex]
The polyatomic ion [tex]\( NO_3 \)[/tex] is known as nitrate and carries a -1 charge.
2. Combine the cation and anion:
- The compound [tex]\( Ca(NO_3)_2 \)[/tex] consists of one calcium ion ([tex]\( Ca^{2+} \)[/tex]) and two nitrate ions ([tex]\( NO_3^- \)[/tex]) to balance the charges.
3. Naming the compound:
- The name of the compound is constructed by stating the name of the cation first (calcium) followed by the name of the anion (nitrate).
Therefore, the correct name for the compound [tex]\( Ca(NO_3)_2 \)[/tex] is "calcium nitrate."
Thus, the correct answer is:
B. calcium nitrate
