List all possible unit formulas (chemical formulas) that can be constructed by the formation of binary ionic compounds from the following elements. (Separate substances in a list with a comma.)
Br (Z = 35), Sr (Z = 38), Ca (Z = 20), Ga (Z = 31), O (Z = 8)
Please help! I have no idea what this is asking me to do.
Br ion is -1 in general
Sr ion is +2
Ca ion is +2
Ga ion is +3
O ion is - 2
so Br and O are our negative ions
match them up with the positives (metals)
Sr and Br = SrBr2
Sr and O = SrO
Ca and Br = CaBr2
Ca and O = CaO
Ga and Br = GaBr3
Ga and O = Ga2O3 2*3=6 and 3*2=6
Ionic compounds form between metals and non-metals. You have Sr, Ca, Ga metals and Br and O non-metals.
Examples:
Br and Sr would be SrBr2.
Br and Ga would be GaBr3.
etc. with Br and other metals.
Br and O would be BrO2 but BrO2 isn't that well known AND it isn't ionic so I would include it.
You go through with O and metals but remember to get all of the combinations with Br. I didn't include all of them.
Sure! The question is asking you to form binary ionic compounds using the given elements and list all the possible unit formulas (chemical formulas) that can be constructed.
To form binary ionic compounds, you need to pair a cation (positively charged ion) with an anion (negatively charged ion). In this case, the cation will come from one of the elements Br, Sr, Ca, or Ga, and the anion will come from the element O.
Here are the possible combinations:
1. Br with O: Bromine forms the cation (Br+) and oxygen forms the anion (O2-). The unit formula will be Br2O.
2. Sr with O: Strontium forms the cation (Sr2+) and oxygen forms the anion (O2-). The unit formula will be SrO.
3. Ca with O: Calcium forms the cation (Ca2+) and oxygen forms the anion (O2-). The unit formula will be CaO.
4. Ga with O: Gallium forms the cation (Ga3+) and oxygen forms the anion (O2-). The unit formula will be Ga2O3.
So, the possible unit formulas are: Br2O, SrO, CaO, and Ga2O3.
Remember, the numbers attached to the elements represent the charge of the ions formed.
Sure! I can help you with that.
To construct the unit formulas for binary ionic compounds, we combine the chemical symbols for the elements involved, with the cation listed first and the anion listed second. Binary compounds are composed of only two elements.
In order to determine the possible unit formulas, we need to identify the possible combinations of cations and anions among the given elements.
Let's go through the elements one by one:
1. Br (Z = 35): Bromine is a nonmetal and typically forms anions with a charge of -1. So, the possible anion is Br-.
2. Sr (Z = 38): Strontium is a metal and typically forms cations with a charge of +2. So, the possible cation is Sr2+.
3. Ca (Z = 20): Calcium is also a metal and typically forms cations with a charge of +2. So, the possible cation is Ca2+.
4. Ga (Z = 31): Gallium is a metal and typically forms cations with a charge of +3. So, the possible cation is Ga3+.
5. O (Z = 8): Oxygen is a nonmetal and typically forms anions with a charge of -2. So, the possible anion is O2-.
Now, we can combine the cations and anions to form the unit formulas:
- For Br (anion) combined with Sr (cation): The unit formula is SrBr2.
- For Br (anion) combined with Ca (cation): The unit formula is CaBr2.
- For Br (anion) combined with Ga (cation): The unit formula is GaBr3.
- For O (anion) combined with Sr (cation): The unit formula is SrO.
- For O (anion) combined with Ca (cation): The unit formula is CaO.
- For O (anion) combined with Ga (cation): The unit formula is Ga2O3.
So, the possible unit formulas (chemical formulas) are: SrBr2, CaBr2, GaBr3, SrO, CaO, Ga2O3.
Make sure to double-check the charges of the cations and anions, as they determine the subscripts in the unit formulas.