0
Why scandium has valency of 3 whereas its outer shell has only two electrons?
Wiki User
∙ 14y ago
scandium belongs to 3d series and in scandium in addition to 2 electrons in 4s one electron of 3d subshell also takes part in bonding so its valency is three despite of only two electrons in outer shell. remember valency is no. of electrons taking part in bonding
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What does the electron in the outer most level determine?
It is generally called the valence electron as it determines the valency of electrons.
What is the valency of barium?
As Barium's atomic number is 56 and as it has 2 electrons in its outer shell (this is also due to the fact that it is in Group 2) its valency is 2. It loses 2 electrons to attain the electronic configuration of Xenon whose atomic number is 54, so it is electropositive and is a metal.Therefore its valency is 2+. As Barium's atomic number is 56 and as it has 2 electrons in its outer shell (this is also due to the fact that it is in Group 2) its valency is 2. It loses 2 electrons to attain the electronic configuration of Xenon whose atomic number is 54, so it is electropositive and is a metal.Therefore its valency is 2+.
What is the difference between valency and valence electron?
valence electrons are on the outer shell. they're the ones that will interact with other molecules as bonds are formed. electrons on inner shells don't interact with other molecules. they keep to themselves.
Which element has highest valency?
8 which is a full outer electron shell. There are two exceptions: Helium(He) and Hydrogen(H) which can only have 2 electrons in their outer shell.
How many more valence electons does carbon need to have a full outer valence shell?
Carbon need to obtain four more electrons in order to obtain a noble gas configuration.
What is the most important factor in an elements place in the periodic table?
Its elemental weight
Why is the valency of oxygen 2 instead of 6?
The valency of an element indicates the way it will react in a chemical reaction. For example, oxygen has six outer electrons and only needs eight electrons to have a complete outer shell. It can either lose six electrons or gain two electrons. It is easier for an oxygen atom to gain two more electrons and therefore its valency is 2.
Why sodium and magnesium valency 1?
magnesium has 2 outer electrons, its valence is 2+ sodium has 1 outer electrons, its valence is 1+
How do you find valency?
The valency of an element measures its ability to combine with other elements. This valency is determined by the number of electrons in the outer shell of each atom of an element.
If an atom Y contains 6 electrons in the outer shell what will be its valency?
It needs two more electrons to complete octet and hence its valency will be two if it is non metallic.
How many valance electrons are in magnesium?
Magnesium has 2 electrons in its outer most shell and these 2 are the valency electrons.
What is the 21 element?
The element with the atomic number 21 is Scandium. Scandium is the first transition metal and is in Group 3, Period 4 of the Periodic Table. It has 21 electrons in 4 shells with 2 electrons in the outer shell.
What does the electron in the outer most level determine?
It is generally called the valence electron as it determines the valency of electrons.
How many valence electrons are in boron?
3 valence electronsThere are three valance electrons. These are the electrons in the outer shell if it is not full.
What is the valency of barium?
As Barium's atomic number is 56 and as it has 2 electrons in its outer shell (this is also due to the fact that it is in Group 2) its valency is 2. It loses 2 electrons to attain the electronic configuration of Xenon whose atomic number is 54, so it is electropositive and is a metal.Therefore its valency is 2+. As Barium's atomic number is 56 and as it has 2 electrons in its outer shell (this is also due to the fact that it is in Group 2) its valency is 2. It loses 2 electrons to attain the electronic configuration of Xenon whose atomic number is 54, so it is electropositive and is a metal.Therefore its valency is 2+.
When helium's electrons in the outer most shell is two why its valency is 0?
Valency is not the no. of electrons in the outermost shell. It is the no. of electrons an atom has to lose or gain or share to achieve the electronic configuration of nearest noble gas and bcome stable. However, Helium has only K-shell which is complete. Hence it is stable and a noble gas. Therefore, its valency is zero.
What is the difference between valency and valence electron?
valence electrons are on the outer shell. they're the ones that will interact with other molecules as bonds are formed. electrons on inner shells don't interact with other molecules. they keep to themselves.
