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Helium... that's what i found in chemicalelements.com ... but on my science homework (Crossword) it doesnt fit because of the L in Chlorine. :/
Helium is a noble gas with 2 electrons.
(Respond to earlier message:)
I have the same science homework, and if it still helps, 18 down is Fluorine, not Chlorine. And 20 across is Helium.
Wiki User
∙ 12y ago
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∙ 15y agoHelium (He) has 2 protons, 2 neutrons and 2 electrons.
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∙ 10y agoHelium has only 2 valence electrons. The rest noble gases have eight valence electrons.
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∙ 13y agoThe element Helium.
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∙ 11y agohelium (atomic number 2)
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∙ 15y agoHelium
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∙ 14y agoHelium.
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∙ 12y agoHelium
Anonymous
helium
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How do atoms achieve noble gas electron configurations in single covalent bonds?
They achieve noble gas configuration by the sharing of electrons.
How many electrons will a calcium atom Ca lose in order to get a noble gas configuration?
Calcium will lose two electrons to gain the noble gas configuration of Argon.
Which atom has two more electrons than an atom of a noble gas?
The Alkaline Earth metal which comes just after the noble gas
How many electrons must be gained or lost for selenium to achieve a noble gas electron configuration?
Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
What must oxygen do to electrons to attain noble gas status?
it must gain (or share) two electrons
What is a noble gas with two electrons?
Helium
A noble gas with two electrons?
helium
How do atoms achieve noble gas electron configurations in single covalent bonds?
They achieve noble gas configuration by the sharing of electrons.
How many electrons will a calcium atom Ca lose in order to get a noble gas configuration?
Calcium will lose two electrons to gain the noble gas configuration of Argon.
Which atom has two more electrons than an atom of a noble gas?
The Alkaline Earth metal which comes just after the noble gas
How many electrons must be gained or lost for selenium to achieve a noble gas electron configuration?
Selenium should gain two electrons and lose six electrons to achieve a noble gas electron configuration.
How many electrons does barium has to give up to achieve a noble gas electron configuration?
Two electrons.
What must oxygen do to electrons to attain noble gas status?
it must gain (or share) two electrons
Do all noble gases have eight valence electrons?
Yes, except for helium which only two electrons. All noble gases are found under the noble gas family to the far right of the periodic table.
Is a helium a noble gas?
Yes helium is a noble gas because it is very stable, colorless, odorless taste less, but unlike the other noble gases, it has two electrons in its valence shell.
How many electrons does barium have to give up in order to achieve a noble gas electron configuration?
2 electrons as barium has 56 electrons so it will lose two electrons to reach the electronic structure of the nearest noble gas which is xenon 54 electrons
How many electrons must be gained or lost for Mg to attain a noble-gas?
For Mg to attain a pseud noble gas formation it must lose two electrons, becoming the ion Mg2+.
