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Great question! You have to look at aluminum's electron configuration to see it. I'm not sure how far you are in chemistry... The configuration is 1s^2 2s^2 2p^6 3s^2 3p^1 If this is confusing for you, my apologies, I suggest you look up a picture accompanying this on Google. After you understand what aluminum looks like, you take a look at it's valence electrons, which is where I think the first problem lies. The oxidation number of aluminum is 3, because it has 3 valence electrons. The 3s orbital is filled and so it is very happy. The 3p sublevel wants 6 electrons (3 orbitals, 2 e- each), but it only has one. But all atoms want to be like their nearest noble gas, which has eight valence electrons (excluding helium). So even though the 3s subshell is happy, aluminum can be even happier if those two are gone. Hence, aluminum wants to get rid of the "loners" so that it is happier, and more stable. So that's why the oxidation number is 3, but I do believe the valency is 3 as well.
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What is the covalency of carbon?
four
Is covalent force an intermolecular force?
No, covalency does not have its own intermolecular force
B2h4 covalent or ionic?
covalent compound.......the lesser electronegativity........greater covalency
Is zinc oxide covalent or ionic?
Zinc Oxide is ionic. Covalency arises between elements close to each other in their vertical groups in the Periodic Table.
Is aluminium oxide ionic or covalent?
Ionic
What is the covalency of carbon?
four
What is the covalency of sulphur?
Two, like oxygen.
Is covalent force an intermolecular force?
No, covalency does not have its own intermolecular force
B2h4 covalent or ionic?
covalent compound.......the lesser electronegativity........greater covalency
What is covalency of nitrogen in N2O5?
wcovalency means the max number of electron an atom can share with others. nitrogen can share 5 but due to the absence of d orbital it can only share 4. therefore the actual covalency in 4.
Is zinc oxide covalent or ionic?
Zinc Oxide is ionic. Covalency arises between elements close to each other in their vertical groups in the Periodic Table.
Is aluminium oxide ionic or covalent?
Ionic
What benefit do you get from studying interstellar gas and dust?
It helps you understand the fundamental concepts of quantum physiology of the cosmos as well as cereptal covalency
Does aluminum plus iodine forms aluminum oxide?
Aluminum and oxygen form aluminum oxide. Aluminum and iodine form aluminum iodide.
Is aluminum hydroxide a covalent bond or an ionic bond?
Aluminium chloride is a covalent bond. Actually, it is a ionic bond with a higher degree of covalency. This is due to polarization. Cations are very polarizing, while anions are very polarizable. The higher the charge of the cation will increase the degree of distortion of the electron cloud surrounding the anion. This shows that aluminum chloride has a considerable degree of covalent character. Hence, the electron pair will be shared among the atoms. Since, aluminum ion have a very high charge, ie 3+, hence the difference between the calculated and the experimental value of the lattice energy will be very high. Besides, the atomic radius of the chlorine atom is very small. Therefore, aluminum chloride is a covalent bond.
Is aluminum foil an element?
Aluminum foil is made of Aluminum, which is an element. So yes Aluminum foil is a element
What minerals are in aluminum foil?
No but it is made of aluminum which is the most prevalent element in the earth.
