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How come helium has only 2 electrons and is a member of the noble gas?
Wiki User
∙ 15y ago
a noble gas has a full outer shell; in the case of helium the 1s shell is full making it stable and dose not want anymore electrons making it have a low reativity just like the rest of the noble gases
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoBecause it has completely filled valence orbitals.
Wiki User
∙ 11y agoHelium's atomic number is 2. So it has 2 protons and 2 electrons and both the electrons are present in its only shell (only orbital).
Wiki User
∙ 11y agoBecause helium has completely filled valence orbitals as that of other noble gases.
Wiki User
∙ 14y agoHelium is a noble gas because its outer electron shell is full. The first electron shell only has space for two electrons, so helium does not require eight to have a full valence shell.
Wiki User
∙ 11y agoThe outer most orbitals of helium and other noble gases have completely filled orbitals. Hence helium is placed along with the other noble gases.
Wiki User
∙ 11y agoHelium has completely filled orbitals as do other noble gases. Hence, helium is placed with noble gases.
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What does the mass number in helium represent?
The mass number in Helium represents how much space a single helium atom takes up (not including electrons, because electrons can be bonded, and my come and go)
Why does helium and hydrogen does not come in agroup of periodic table?
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
All the elemental gases except for the Noble Gases come in what kind of special molecules?
All the elemental gases except for the noble gases come in molecules that are unstable. The noble gases are all stable, they have the maximum number of valence electrons that their outer shell can hold.
Why do noble gases not react with other compounds and elements?
Having a full octet of electrons in their outermost shell (except Helium) makes these elements very stable. As a matter of fact, other elements come to resemble the inert gases when they react. But under suitable conditions Xenon forms oxides and fluorides ,even Krypton and Argon also react under drastic conditions.
How come noble gases don't form covalent bonds?
Noble gases have completely filled orbitals. They generally have 8 valence electrons (helium has only 2) and obey octet rule (stable electronic configuration). Hence they are chemically inert (or do not react with other elements) and generally don't form covalent compounds
What does the mass number in helium represent?
The mass number in Helium represents how much space a single helium atom takes up (not including electrons, because electrons can be bonded, and my come and go)
How come atoms of noble gases don't form ions?
Noble gases have completely filled orbitals. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. Hence they are chemically inert and generally donot form compounds / ions under normal conditions.
Why does helium and hydrogen does not come in agroup of periodic table?
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
All the elemental gases except for the Noble Gases come in what kind of special molecules?
All the elemental gases except for the noble gases come in molecules that are unstable. The noble gases are all stable, they have the maximum number of valence electrons that their outer shell can hold.
What element has 3 protons 2 neutron and 2 electrons?
The type of a element is determined by the number of protons it carries. The element which have to protons is helium. An instance of the element with more electrons than protons, which makes it negatively charged, is called a anion or a negative ion. However, helium is one of, what are called, inert gases. The number of electrons in an inert gas is at the most stable number. It is quite hard to add or extract electrons from an inert gas. So without sounding absolute, He(-) is quite hard to come by.
Why do noble gases not react with other compounds and elements?
Having a full octet of electrons in their outermost shell (except Helium) makes these elements very stable. As a matter of fact, other elements come to resemble the inert gases when they react. But under suitable conditions Xenon forms oxides and fluorides ,even Krypton and Argon also react under drastic conditions.
How come noble gases don't form covalent bonds?
Noble gases have completely filled orbitals. They generally have 8 valence electrons (helium has only 2) and obey octet rule (stable electronic configuration). Hence they are chemically inert (or do not react with other elements) and generally don't form covalent compounds
What part of an atom can move to another object?
When an atom of one element is brought in contact with an atom of another element, electrons get transferred from one element to another. However, if the atoms of same element come together then electrons are shared and not transferred. Exception to this is elements in noble gases.
What language did helium come from?
Helium was first discovered in the sun. It gets its name from the Greek word, Helios, meaning the sun
Where does the chemical symbol of helium come from?
The symbol, He, comes from the first two letters of the element helium
What matter does helium and hydrogen come in?
Usually in Gas form.
What goes up but does not come back down?
Hydrogen & helium
