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.
Yes
Sodium has ONE valence electron in its outer shell that is to be donated to any kind of oxidant. By then the outer (3rd) shell (of the Na+ ion) is EMPTY, so the 2nd shell has become the outmost, containing 8 electrons (Ne-configuration). No electrons at all are taken up by sodium.
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).
Metalloids do not have a complete outer shell, as they have properties that are intermediate between metals and nonmetals. They typically have three, five, or six electrons in their outer shell, which gives them characteristics of both metal and nonmetal elements.
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.
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