Hydrogen need 1 more electron to fill outermost orbit. Then, H will act as anion.
Helium already has a full valence shell. Because the first orbital holds two, and the second orbital holds eight...Helium is already filling the first shell with its two electrons, and it has no more electrons to spill into the second orbital, therefore it's one and only shell is full. Hydrogen tends to gain one electron in order to fill its outermost energy level. Hydrogen only has one, but it needs two to fill it's valence shell, so it will gain one. Long story short, helium is already full (that's why it's in the noble gas group) and hydrogen tends to gain one electron, and form a negative ion. No honey it has a number and that is 2 duh!!
When these elements have five electrons on the outermost shell of electrons.
To determine how many more elections are needed to fill the outermost energy level of an atom, you need to know the number of electrons already present in that level and the maximum capacity of that level. The outermost energy level can hold a maximum of 8 electrons (following the octet rule) for main group elements. Subtract the number of existing electrons from 8 to find out how many more are needed to fill the level. For example, if there are 5 electrons in the outermost level, 3 more are needed to fill it.
Selenium needs two more electrons.
An oxygen atom can fill its outermost energy level by gaining 2 electrons through bonding with other atoms. This allows it to achieve a full valence shell of 8 electrons, following the octet rule. Alternatively, it can lose 6 electrons to achieve a full valence shell.
1: The outermost ring of hydrogen is the s-level, which can contain only two electrons, and a hydrogen atom itself already has one of these electrons.
It would gain 2 electrons.
Chlorine is MUCH more likely to fill its outermost orbital by gaining electrons.
Atoms can fill their outermost energy level by either gaining electrons from other atoms or by sharing the outermost electrons with another atom.
Helium already has a full valence shell. Because the first orbital holds two, and the second orbital holds eight...Helium is already filling the first shell with its two electrons, and it has no more electrons to spill into the second orbital, therefore it's one and only shell is full. Hydrogen tends to gain one electron in order to fill its outermost energy level. Hydrogen only has one, but it needs two to fill it's valence shell, so it will gain one. Long story short, helium is already full (that's why it's in the noble gas group) and hydrogen tends to gain one electron, and form a negative ion. No honey it has a number and that is 2 duh!!
8
The number of valence electrons needed to fill the outermost energy level varies depending on the atom's position on the periodic table. For most elements, the outermost energy level can hold up to 8 electrons to become stable. However, elements in the first few periods may require fewer electrons to fill their outermost level.
When these elements have five electrons on the outermost shell of electrons.
It is the most stable element in the universe and does not need anymore electrons. Its outermost energy level is full.
The sharing of electrons occurs in covalent bonding.
When atoms share electrons to fill their outermost energy levels, they form covalent bonds. In a covalent bond, electrons are shared between atoms to achieve stable electron configurations.
Electrons only fill the first layer of hydrogen, giving it only two. The rest of the layers are all 8.