The number of electrons in an atom is equal to the number of protons that an atom has. The number of protons an atom has the atomic number and an element is placed on the Periodic Table based on its atomic number. An atom has electron shells where the electrons are placed. the first holds 2 the second holds 8, and the third holds up to 18 electrons but can be stable with only six. When an atoms' outermost electron shell has at least 8 electrons and when there's a vacancy or not enough electrons in the outermost shell, that atom will try to bond with another atom to fill its outermost electron shell. So if an atom has 8 protons then it has 8 electrons which means that 2 electrons will fill the first level and 6 electrons will fill the second level. this means that the atom is unstable and needs to take in 2 electrons from another element or bond with another element.
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because the periods in the periodic table are determined by the arrangement of the electrons!
On the periodic table the number of electrons that are found in the elements increases in each row. The columns all have the same number of outer electrons.
they have the same number of valence electrons
Each group has same number of valence electron. Each period has same number of shells.
Nickel has 28 protons; thus, it has 28 electrons.
Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.
1 Its electron configuration is 1s22s22p63s1. A good periodic table that includes electron configurations can be found under related links.
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.
Two (2) electrons (s shell)Eight (8) electrons (2 in s, 6 in p)Eighteen (18) electrons (2 in s, 6 in p, 10 in d)The periodic table PDF at Los Alamos National Laboratory is pretty good and has the shell configurations. See related link.
Perhaps the related link is what you are looking for. If not, please explain and resubmit your question.
As you go down a group, the number of electrons in the outer shell is the same.
All non-metals have either 5, 6 or 7 electrons in their octet which makes them suitable to gain electrons to achieve stability. Hence it is difficult for electrons to lose electrons.
Nonmetals are closer to a full outer shell. They would rather gain electrons to complete the shell. They are unlikely to lose electrons.
number of valence electrons
The number of electron shells is equal to the period number.
the periodic table of elements In this table, elements having similar chemical properties are stacked up. The chemical properties are determined by how many free bonds an atom has open, which is related to how many electrons are in that element's outer shell.
Periodic trends affect how certain elements on the periodic table react with each other. For example, Ionization energy tend : metals want to give off electrons , non metals want to gain electrons. This trend is essentially which elements are likely to react together and how they would react together, which is essentially ion formation (gain or loss of electrons through a reaction).
Nickel has 28 protons; thus, it has 28 electrons.
The period number is the same as the highest energy level containing electrons for the atoms in that period.
Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.
1 Its electron configuration is 1s22s22p63s1. A good periodic table that includes electron configurations can be found under related links.