Silicon. Electronic configuration [Ne]3s23p2
Two electrons imply that the element is in the second period. The 4 valence electrons says that it is located in group 4A (or group 14 in modern notation). Hence, this element is carbon.The element has 2 electron shells means the element is in the 2nd group. This element is carbon. It has 4 valence electrons.
This element is sulfur; the electron configuration of sulfur is [Ne]3s23p4. Sulfur has three electron shells cotaining 2, 8 and 6 electrons. The last six are valence electrons.
Calcium has 2 valence electrons and 4 electron shells. It is represented by the chemical symbol Ca.
Electron shells
All these have one electron in their valence shell.
Two electrons imply that the element is in the second period. The 4 valence electrons says that it is located in group 4A (or group 14 in modern notation). Hence, this element is carbon.The element has 2 electron shells means the element is in the 2nd group. This element is carbon. It has 4 valence electrons.
Element 17's valence electron configuration is 3s23p5.
This element is sulfur; the electron configuration of sulfur is [Ne]3s23p4. Sulfur has three electron shells cotaining 2, 8 and 6 electrons. The last six are valence electrons.
Calcium has 2 valence electrons and 4 electron shells. It is represented by the chemical symbol Ca.
Period number = no. of electron shells. Therefore neon has two shells.
Electron shells
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
Valency is the number of electrons in the outer shell the charge is how many electrons is needed to form an octet (full valence = 8 electrons) Eg. Sulfur valence = 6 charge = -2 (needs to gain 2 electrons to gain an octet)
The three factors determine the chemical properties of an element:The number and arrangement of electrons in an atomThe number of valence electronsThe number and arrangement of electrons
All these have one electron in their valence shell.
Selenium has 6 electrons in its outermost shell.
The period (row) indicates how many electron shells the element has and the family (column) indicates how many valence electrons the element has.