Question

1. choose the best answer using the periodic table.

what is the name of this compounds name: mg₃p₂
trimagnesium diphosphide
phosphorus magnesium
magnesium phosphorus
magnesium phosphide

1. choose the best answer using the periodic table.

which type of bond forms between cesium (cs) and fluorine (f) atoms?
metallic bond
covalent bond
ionic bond
hydrogen bond

Explanation:

Question 7

To name the ionic compound \( \text{Mg}_3\text{P}_2 \), we first identify the ions. Magnesium (\( \text{Mg} \)) forms \( \text{Mg}^{2+} \) ions, and phosphorus (\( \text{P} \)) forms \( \text{P}^{3-} \) (phosphide) ions. In ionic compound naming, we use the cation name first (magnesium) and then the anion name (phosphide). The subscripts in the formula (3 and 2) are used to balance charges, but for naming, we don't use prefixes for monatomic ions in binary ionic compounds (since the charges determine the ratio, and we use the -ide suffix for the anion). So "magnesium phosphide" is correct. The other options are incorrect: "trimagnesium diphosphide" uses prefixes (unnecessary for binary ionic with monatomic ions), "phosphorus magnesium" and "magnesium phosphorus" use element names instead of ion names (and don't use the -ide suffix for the anion).

Cesium (Cs) is a metal (alkali metal) and fluorine (F) is a non - metal (halogen). Ionic bonds form between a metal and a non - metal, where the metal loses electrons and the non - metal gains electrons. Metallic bonds form between metal atoms. Covalent bonds form between non - metals (sharing electrons). Hydrogen bonds are intermolecular forces, not intramolecular bonds between atoms. So the bond between Cs and F is ionic.

Answer:

D. magnesium phosphide

Question 8