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According to a law, the orbital with lower n+l value fills first. So 4S has lower energy
i.e. lower n+l value (4) than 3D (5).
So the elements after 3P^6 move to the 4th Periodic Table .
What else can I help you with?
How many elements in the first period?
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
How many electrons do period 3 in periodic table have?
period 3 elements in the periodic table have 3 electrons in there outher shell hence the name.
What are the following elements that are in the same period as magnesium?
Magnesium is in Period 3 of the periodic table. The elements in the same period as magnesium (atomic number 12) include sodium (11), aluminum (13), silicon (14), phosphorus (15), sulfur (16), chlorine (17), and argon (18). These elements share the same highest energy level, which is the third shell in this case.
How many elements are in the third period?
Eight. Sodium, Magnesium, Aluminium, Silicon, Phosphorous, Sulfur, Chlorine, Argon
What are the two elements in the same period as magnesium?
Magnesium is in period 3 of the periodic table. The two elements in the same period as magnesium are aluminum (Al) and silicon (Si). Both elements follow magnesium in this period, with aluminum located to the right of magnesium and silicon further to the right.
How many elements can the 3rd shell hold?
The 3rd shell can contain 18 electrons. The elements that have a 3rd shell as the outer shell are the the elements in period 3, where the 3s and 3p orbitals are filled to a maximum of 8 electrons. The 3d orbitals are filled in the 4th period in the transition elements.
What were the numbers of the elements in period 3?
11-18.
How many elements in the first period?
Period 1: 2 elements Period 2: 8 elements Period 3: 8 elements Period 4: 18 elements Period 5: 18 elements Period 6: 32 elements Period 7: 25 elements
How many electrons do period 3 in periodic table have?
period 3 elements in the periodic table have 3 electrons in there outher shell hence the name.
Valencies of the first 20 elements?
Period 1 (Elements 1 and 2)1s1 - 1s2Period 2 (Elements 3 - 10)2s1 - 2s22p6Period 3 (Elements 11 - 18)3s1 - 3s23p6Period 4 (Elements 19 and 20)4s1 - 4s2
What period are the following elements?
period 3
What is the maximum and minimum of 4 9 6 12 3 18?
18 and 3
How many energy levels are found in period 3?
The period number is equal to the number of energy levels. Elements of period 3 have 3 energy levels. Na,Mg,Al,Si are few elements in the period 3.
Which periods have the same number of elements?
Period 4 and period 5 of the periodic table have the same number of elements. There are 18 elements in each period. While some elements in period 4 are calcium, iron, and zinc, elements in period 5 are tin, antimony, and iodine.
How many electrons can occupy the 4f sublevel?
The elements in period 4 that have electrons in the 3d sublevel are elements 21 - 36. Refer to the Related Links for a printable periodic table that includes electron configurations.
What are the following elements that are in the same period as magnesium?
Magnesium is in Period 3 of the periodic table. The elements in the same period as magnesium (atomic number 12) include sodium (11), aluminum (13), silicon (14), phosphorus (15), sulfur (16), chlorine (17), and argon (18). These elements share the same highest energy level, which is the third shell in this case.
How would you justify the presence of 18 elements in the fifth of period of periodic table?
In the fifth period of the periodic table, the atoms of the elements in the first two groups are adding 1 and 2 electrons, respectively, to their highest energy 5s sublevel. Starting in group 3/IIIB and going through group 12/IIB, the atoms of those elements are adding electrons to their highest energy 4d sublevel. Since the d sublevel can contain a maxium of 10 electrons, there are 10 elements whose atoms are filling the 4d sublevel. Once the 4d sublevel is filled, the next higher energy sublevel is the 5p sublevel. Starting with the group 13/IIIA elements, the 5p sublevel is being filled. Since a p sublevel can contain a maximum of 6 electrons, there are six elements whose atoms are filling the 5p sublevel. 5s sublevel filling: 2 elements 4d sublevel filling: 10 elements 5p sublevel filling: 6 elements --------------------------------------- Total: 18 elements For a printable periodic table that includes electron configurations, go to the following link: http://www.nist.gov/pml/data/periodic.cfm
