What element is in period Row 3?
What element is in period Row 3?
The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon.
Why does period 3 only have 8 elements?
According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.
Why are there 8 elements in rows 2 and 3 of the periodic table?
There are 8 elements in period 2 because all those elements have electrons in the second shell and no electrons in the third shell.
What does period 3 mean on the periodic table?
The horizontal rows of the periodic table are called periods. Period 3, or the third period, refers to the third row from the top of the periodic table. The elements in period 3 of the periodic table are: Name of Element. sodium.
What element in period 3 is a metal?
Magnesium. Magnesium (symbol Mg) is an alkaline earth metal and has common oxidation number +2. It is the eighth most abundant element in the Earth’s crust and the ninth in the known universe as a whole.
What element is in Group 3 period 3?
Group 3A (or IIIA) of the periodic table includes the metalloid boron (B), as well as the metals aluminum (Al), gallium (Ga), indium (In), and thallium (Tl). Boron forms mostly covalent bonds, while the other elements in Group 3A form mostly ionic bonds….Group 3A.
| 4A | (14) |
|---|---|
| 5A | (15) |
| 6A | (16) |
| 7A | (17) |
| 8A | (18) |
Why does 3rd period have 18 elements?
The third period contains only eight elements even though the electron capacity of the third shell is 18 because when the other shells get filled and the resultant number of electrons becomes eighteen, it gets added up and settles in the third electron shell and three shells are acquired by the fourth period.
What sublevels are filled in period 3?
In the second period, the 2s sublevel, with two electrons, and the 2p sublevel, with six electrons, are being filled….Periods and Blocks.
| Period | Number of Elements in Period | Sublevels in Order of Filling |
|---|---|---|
| 2 | 8 | 2s 2p |
| 3 | 8 | 3s 3p |
| 4 | 18 | 4s 3d 4p |
| 5 | 18 | 5s 4d 5p |
Why are there only 8 elements in the 3rd row of the periodic table even though the principle quantum number n 3?
Conclusion :- according to Afbau principle , we can’t fill 3d orbital without filling 4s . But if we take 4s then it will be 4th period. Thats why third period contain only 8 elements even though the electron capacity of the third shell is 18.
Why there are only 8 elements in the second period?
What do all the atoms of the elements in Period 3 have in common?
Atoms in the second and third period have the same number of electrons in the inner shells. Among these elements, only the number of electrons in the outermost shell changes.
Which element is in period 3 and group 2?
magnesium
Hence the name of the element is magnesium.
