No, noble gasses do.
Metalloids can form cations by losing electrons to achieve a stable electron configuration. Noble gases, on the other hand, typically do not form cations as they have a stable electron configuration due to having a full outer shell of electrons.
Stable atoms.
No, metalloids typically do not have a full valence shell of electrons. They have properties that are in between metals and nonmetals, which means they can exhibit characteristics of both types of elements.
There is one electron on cobalts outer shell.
2 outer shell electrons
No, it doesn't have a complete octet. Phosphorous is in group 5A, meaning it has 5 valence electrons (5 electrons on its outest shell).
No. It has one electron which is readily lost to produce the Na+ ion. Note - the ONLY elements with a complete outer shell are the noble gasses.
Iodine has 7 electrons in its outer most shell. It completes its valence shell by obtaining one electron to form iodide ion.
a stable compound
The noble gases
An atom of oxygen needs 2 electrons to complete its outer shell, which can hold a total of 8 electrons. Oxygen has 6 electrons in its outer shell, so it will gain 2 electrons through bonding to achieve a full valence shell.
Metalloids can form cations by losing electrons to achieve a stable electron configuration. Noble gases, on the other hand, typically do not form cations as they have a stable electron configuration due to having a full outer shell of electrons.
Elements with complete outer shells have a full valence shell of electrons and are stable. This configuration is typically achieved by having eight electrons in the outer shell (known as the octet rule) or two electrons for the first shell. These elements are generally inert or have low reactivity due to their stable electron configuration.
Stable atoms.
8
two
Carbon has four electrons in its outer shell and needs four more electrons to complete its octet.