Copper is one example. There are several different types of copper so the name gives it away rather than needing to have the ions present.
Group 1 and Group 2 metals (alkali metals and alkaline earth metals) do not require their charge oxidation number specified in the names of ionic compounds they form. This is because they typically have a fixed charge that does not vary.
Platinum typically forms ions with a charge of +2 in chemical compounds.
Selenium form anions.
The charge on phosphorus can vary depending on the compound it is in. Phosphorus typically forms compounds with a charge of -3 or +3, but it can also form compounds with other charges such as -2 or +5.
+3 is Boron's overall charge. Boron's ionic charge is +5.
Group 1 and Group 2 metals (alkali metals and alkaline earth metals) do not require their charge oxidation number specified in the names of ionic compounds they form. This is because they typically have a fixed charge that does not vary.
Oxygen typically has a charge of -2 when it forms compounds.
Platinum typically forms ions with a charge of +2 in chemical compounds.
Calcium forms a 2+ charge on its monatomic ion in its compounds. This is because it typically loses two electrons to achieve a full outer electron shell.
Selenium form anions.
The charge on phosphorus can vary depending on the compound it is in. Phosphorus typically forms compounds with a charge of -3 or +3, but it can also form compounds with other charges such as -2 or +5.
+3 is Boron's overall charge. Boron's ionic charge is +5.
Magnesium is an element with a +2 charge when it forms ionic compounds, not a negative one.
The charge on the cation in FeSO4 is +2, as iron (Fe) typically forms a 2+ cation in ionic compounds.
No, MgF3 will not form because the charge of the magnesium ion (Mg^2+) and the fluoride ion (F^-) do not allow for the formation of MgF3. Magnesium typically forms compounds with a 2+ charge, and fluoride typically forms compounds with a 1- charge, resulting in the formation of MgF2 instead.
Mg, magnesium forms compounds containing Mg2+ ion.
The charge on calcium in CaBr2 is +2. This is because calcium is a group 2 element and typically forms 2+ cations in compounds.