Quick Answer: Why Does Scandium Have 9 Electrons In The Third Shell?

Can an atom make 8 bonds?

The ability to use the d subshell is what makes it possible for atoms to go beyond the octet, and it’s also why atoms up to the second period cannot do that.

For that same reason, six or seven bonds are possible, and Xenon can form 8 covalent bonds in the compound XeO4!.

Why do atoms want 8 electrons?

Row 3 elements on the left lose electrons to gain a full outer shell, elements on the right usually gain electrons to have 8 electrons in their outer shell. The basis of the octet rule is that atoms ‘want’ a full outer shell of electrons, i.e. they are most stable with a full outer shell.

Why does titanium have 4 valence electrons?

Counting along a row from the left gives the number of valence electrons. Titanium is 4 elements from the left and has 4 valence electrons. … Because they have the same valence shell electronic configuration, adjacent elements in any column make similar compounds.

How many electron shells does scandium have?

Scandium atoms have 21 electrons and the shell structure is 2.8. 9.2. The ground state electron configuration of ground state gaseous neutral scandium is [Ar].

How many electrons are in each shell?

Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.

Who found scandium?

Lars Fredrik NilsonPer Teodor CleveScandium/Discoverers

Why is scandium electron configuration?

Scandium has an atomic no. of 21. Therefore electronic configuration of scandium(Sc) is: … Here, two electrons are in 4s orbital instead of being in 3d orbital because 4s orbital is having lesser energy than 3d orbital and 4s orbital also gives full-filled stability which 3d can not give.

Does oxygen give or take electrons?

Oxygen likes to have two additional electrons to make it happy. … You can see that the Oxygen atom has eight electrons (6 of its own, and one from each lithium), and the two lithium atoms have two electrons each.

What is scandium used for?

Scandium is mainly used to create high-intensity lighting and mercury vapor lamps (used mainly for photography and television/movies) Scandium produces light that is very similar to natural sunlight, according to Chemicool.

Can two electrons be in the same shell?

The state of a system is completely described by a complete set of quantum numbers. … The Pauli exclusion principle says that no two electrons can have the same set of quantum numbers; that is, no two electrons can be in the same state. This exclusion limits the number of electrons in atomic shells and subshells.

Why do we write 3d before 4s?

The 4s electrons are lost first followed by one of the 3d electrons. This last bit about the formation of the ions is clearly unsatisfactory. We say that the 4s orbitals have a lower energy than the 3d, and so the 4s orbitals are filled first. … So the 4s orbital must have a higher energy than the 3d orbitals.

What is the 2 8 8 rule in chemistry?

There is a 2-8-8 rule for these elements. The first shell is filled with 2 electrons, the second is filled with 8 electrons, and the third is filled with 8. You can see that sodium (Na) and magnesium (Mg) have a couple of extra electrons. They, like all atoms, want to be happy.

Which particle has the least mass?

a.Electrons are negatively charged and are the heaviest subatomic particle.b.Protons are positively charged and the lightest subatomic particle.c.Neutrons have no charge and are the lightest subatomic particle.d.The mass of a neutron nearly equals the mass of a proton.

What is the full electron configuration of SC 3 +?

[Ar] 3d¹ 4s²Scandium/Electron configuration

What element is 1s2 2s2 2p6 3s2 3p6 4s2 3d6?

ironThus, following the rules on how to fill the orbitals, the electronic configuration of iron (for example) is 1s2 2s2 2p6 3s2 3p6 4s2 3d6 , and it is abbreviated form [Ar] 4s2 3d6.

Which element has the following electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2?

antimony atomSo, an antimony atom with charge +2 has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p1.

Why does the third shell have 8 electrons?

The third shell of an atom has 18 electrons only not 8 electrons. You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled. They are filled because of the n-l rule. … So after filling the 3s and 3p subshell with 8 electrons, the next shell to fill is the 4s one.

Why does scandium have 3 valence electrons?

The +3 oxidation state is the most common. Scandium Z=21 has an electronic configuration [Ar] 4s 3d. Both the 4s and 3d electrons are easily mobilized into bonding, so we can conclude that scandim has three valence electrons.