Na4Si
sodium silicon compound
Sodium ions can balance Si4- in simple ionic examples.
What Is the Charge of Silicon?
Silicon commonly forms Si4- Si4+ in introductory ionic compounds.
Quick answer: Silicon usually has a common ionic charge of -4 or +4, written as Si4- or Si4+.
| Element | Silicon |
|---|---|
| Symbol | Si |
| Atomic number | 14 |
| Common ionic charge | -4, +4 |
| Common ions | Si4-, Si4+ |
Why Silicon has this charge
Silicon has common reference charges of -4, +4. Use the compound name and context to distinguish ionic charge from oxidation state.
Silicon charge examples
CaSi2
calcium silicon compound
Calcium ions can balance common negative Silicon ions.
FAQ
Is Silicon charge the same as oxidation state?
Ionic charge is the charge on an actual ion. Oxidation state is a bookkeeping number used inside compounds. They can match, but they are not always the same thing.
How do I use this in formulas?
Combine positive and negative ions so the total charge is zero. You can also use the ionic compound calculator.
Where can I see the full chart?
Use the periodic table with charges or the ionic charges chart.