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.
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.
You think probable to carbon.
The electron configuration of carbon is [He]2s2.2p2.
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.
Silicon. Electronic configuration [Ne]3s23p2
Electron shells
All these have one electron in their valence shell.
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.
Silicon. Electronic configuration [Ne]3s23p2
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.