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How many electrons do hydrogen and helium need to fill their outermost energy level?
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!!
What else can I help you with?
How many valence electrons does heluim need to have a filled outermost energy level?
Helium only needs two electrons to have a filled outermost energy level.
The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains elements?
with an electron configuration that fills up to 2 electrons in their outermost energy level. This includes hydrogen and helium, which have one and two electrons in their outermost s orbital, respectively.
Helium atoms only need how many valence electrons to have a filled outermost energy level?
Helium atoms only need 2 valence electrons to have a filled outermost energy level because helium is in the first period of the periodic table and its outermost energy level can only hold a maximum of 2 electrons.
Which noble gas does not have eight electrons in it's highest occupied energy level?
Helium is the noble gas that does not have eight electrons in its highest occupied energy level. It only has two electrons in its outermost energy level.
How many number of electrons of helium in outer ring?
Helium has only two electrons with one ring (or energy level). Both the electrons are in the one and only energy level / shell / ring.
Atoms with lessthan 4 electrons in their outermost shell?
Hydrogen and Helium
How many valence electrons does heluim need to have a filled outermost energy level?
Helium only needs two electrons to have a filled outermost energy level.
The first period in the periodic table represents elements that possess only the first energy level s orbital therefore this period contains elements?
with an electron configuration that fills up to 2 electrons in their outermost energy level. This includes hydrogen and helium, which have one and two electrons in their outermost s orbital, respectively.
Does helium has a full outermost energy level with two electrons?
Yes it does.
Helium atoms only need how many valence electrons to have a filled outermost energy level?
Helium atoms only need 2 valence electrons to have a filled outermost energy level because helium is in the first period of the periodic table and its outermost energy level can only hold a maximum of 2 electrons.
Which element has a full outermost energy level contining only two electrons?
Helium has a full outermost energy level containing only two electrons.
What atom has a full outermost energy level that contains two electrons?
helium
Which element has a full outermost energy level containing two electrons?
Helium (He)
A helium he atom has 2 electrons that are both in the outermost energy level how many more electrons does the atom need to fill its outermost energy level?
It is the most stable element in the universe and does not need anymore electrons. Its outermost energy level is full.
How many energy levels would electrons of hydrogen and helium fill?
Electrons of hydrogen fill up to two energy levels, while electrons of helium fill up to a total of two energy levels as well. Helium has an additional energy level compared to hydrogen because it has 2 electrons, filling up both the first and second energy level.
What contains 8 electrons in the outermost energy level?
Noble gases (except for helium which has 2 valence electrons).
Which noble gas does not have eight electrons in it's highest occupied energy level?
Helium is the noble gas that does not have eight electrons in its highest occupied energy level. It only has two electrons in its outermost energy level.
