Question

1.) The chemical formula for the ionic compound formed when elements of Ca and N react is

when lithium and sulfide ion react is
when iron (II) and chlorine react is __________, when
aluminum and sulfate ion react is
2.) Write the formulas and charges for the following ions: Phosphate, nitrite, nitrate, hydroxide,
carbonate, ammonium.
3.) What is the total number of atoms in one molecule of CH₂O6?
4.) What types of elements when combined would be most likely to form an ionic compound?
5.) What is the ionic charge on the chromium ion in the ionic compound that has the formula Cr₂O₂?
6.) In a polyatomic ion the -ite ending indicates one fewer
atom than the -ate ending.
7.) The ionic charge of lead, Pb, in the compound PbS₂ is
8.) If a bonding pair of electrons is unequally shared between two atoms, the bond is ________
are some properties of polar compounds compared to nonpolar compounds?
9.) Which elements exist as diatomic molecules?

Answer 1

The ionic compound formula for Ca and N is Ca3N2, and there are a total of 9 atoms in a CH2O6 molecule. Elements most likely to form an ionic compound are metals and nonmetals. The chromium ion in Cr2O3 has a charge of +3.

Step-by-step explanation:

Chemical Formulas and Ionic Compounds

When elements such as Ca and N react, they form an ionic compound known as calcium nitride with the formula Ca3N2. The chemical formulas for the ions are:

• Phosphate: PO43-
• Nitrite: NO2-
• Nitrate: NO3-
• Hydroxide: OH-
• Carbonate: CO32-
• Ammonium: NH4+

A CH2O6 molecule has a total of 9 atoms: 1 carbon, 2 hydrogen, and 6 oxygen atoms. Elements that are most likely to form an ionic compound are typically a metal combined with a nonmetal. In Cr2O3, each chromium ion has a charge of +3. The ionic charge on lead in PbS2 is +4. Bonds that are unequally shared between two atoms are considered polar, and polar compounds generally have higher melting points, boiling points, and are soluble in water compared to nonpolar compounds. The elements that exist as diatomic molecules are H, N, O, F, Cl, Br, and I.