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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 .
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoIn theory, there could be more; but scientists haven't synthesized elements that high yet.
Each horizontal row represents how many electron shells a given atom has; hydrogen and helium, in the top row, have only one shell; while elements 87 (francium) through 118 (ununoctium) have seven shells. If and when element 119 is formed, it will be the first element to sit in the eighth row of the periodic table.
Wiki User
∙ 14y agoThe 4s orbitals have (slightly) lower energy than the 3d orbitals, so the periodic table jumps to period 4 after the 3p orbitals are filled.
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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 elements are in the third period?
Eight. Sodium, Magnesium, Aluminium, Silicon, Phosphorous, Sulfur, Chlorine, Argon
Which of the representative elements in period 4 has 3 valence electrons?
scandium
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 two names for group 18 elements?
Elements of Group 18 may be called as;1-Noble gases 2-Rare gases 3- Inert gases
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
What were the numbers of the elements in period 3?
11-18.
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.
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 is the correlation of a period number with the elements of that period?
all the elements in period 1 have one energy level, all the elements in period 2 have two energy levels, all the elements in period 3 have 3 energy levels... and so on
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.
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.
How many Group 17 elements are in Period 3 of the Periodic Table?
Group 17 elements (Halogens)Fluorine- Period 2Chlorine- Period 3Bromine-Period 4Iodine- Period 5Astatine- Period 6Ununseptium-Period 7There is 1 element from Group 17 that is part of Period 3.
How many group 17 elements are in periodic 3 of the periodic table?
Group 17 elements (Halogens)Fluorine- Period 2Chlorine- Period 3Bromine-Period 4Iodine- Period 5Astatine- Period 6Ununseptium-Period 7There is 1 element from Group 17 that is part of Period 3.
Is argon chlorine?
No. Argon and chlorine are two different elements. Both belong to period 3. But chlorine is a group 17 element (with 17 protons) whereas argon belong to group 18 and has 18 protons.
