What happens when a sodium atom loses an electron in its outer energy shell apex?
When sodium atom loses an electron from its outer energy shell, it becomes Na+ ion.
What happens when a chlorine atom gains an electron?
Chlorine gains an electron, leaving it with 17 protons and 18 electrons. Since it has 1 more electron than protons, chlorine has a charge of −1, making it a negative ion.
Does magnesium have positive or negative charge?
An ion is a charged particle formed when an atom , or a group of atoms, loses or gains electrons ….Simple formulae.
| Name of compound | Formula | Electrical charges |
|---|---|---|
| Magnesium oxide | MgO | Two positive, two negative |
| Magnesium chloride | MgCl 2 | Two positive, two negative |
What happens when a magnesium atom reacts with an oxygen atom?
When a magnesium atom reacts with an oxygen atom, magnesium gives up its two valence electrons and becomes a positively charged ion, i.e. a cation, “Mg”^(2+). Oxygen accepts these two electrons and becomes a negatively charged ion, i.e. an anion, “O”^(2-).
Why does magnesium have 2 valence electrons and oxygen have 6?
Explanation: On the other hand, oxygen, O, has 6 valence electrons, so it’s much easier for oxygen to add two electrons to its outermost shell in order to complete its octet. When a magnesium atom reacts with an oxygen atom, magnesium gives up its two valence electrons and becomes a positively charged ion, i.e. a cation, Mg2+.
When does an atom have 8 valence electrons?
The reactivity of atoms is governed by their “desire” to obtain a stable electron configuration for their outermost energy shell. As you know, this happens when an atom has 8 electrons, also called valence electrons, in its outermost energy shell, i.e. when the atom has a complete octet.
How are the electrons of oxygen attracted to each other?
Oxygen accepts these two electrons and becomes a negatively charged ion, i.e. an anion, O2−. The cation and the anion will then be attracted to each other by way of the electrostatic force of attraction → an ionic bond is formed.