The element in the same period as helium that has only one valence electron is lithium. Both helium and lithium are located in Period 1 of the Periodic Table, with helium in Group 18 (noble gases) and lithium in Group 1 (alkali metals). Lithium has the atomic number 3 and has one electron in its outermost shell, making it highly reactive.
The element with 1 electron in period 1 would be hydrogen.
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
Silicon is p-block element. It has 4 valence electrons. It is present in group-14.Titanium has 4 valence electrons. It is in the third period. Titanium is a metal element.
The element in group V of the periodic table with 3 electron shells is Phosphorus (P). Group V elements have 5 valence electrons and the number of electron shells corresponds to the period number on the periodic table, so a Group V element with 3 electron shells is in period 3.
Helium is an element. It is a noble gas. It is in the 18th period.
The element with 1 electron in period 1 would be hydrogen.
Potassium (K) has one valence electron and is located in period 4 of the periodic table.
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
Silicon is p-block element. It has 4 valence electrons. It is present in group-14.Titanium has 4 valence electrons. It is in the third period. Titanium is a metal element.
Selenium. As you go across the groups, not counting the transition metals, a valence electron is added.
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.
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.
The element in group V of the periodic table with 3 electron shells is Phosphorus (P). Group V elements have 5 valence electrons and the number of electron shells corresponds to the period number on the periodic table, so a Group V element with 3 electron shells is in period 3.
Helium is a period 1 element.
The period tells you the valence ELECTRON SHELL (energy level). The group tells you the number of valence electrons.
In a period, the number of electron shells increases from left to right across the period, resulting in an increase in energy levels and electron shells. In a family (or group), elements have the same number of electrons in their outermost shell, leading to similar chemical properties. Additionally, elements within the same family tend to have similar valence electron configurations.
The number of valence electrons increases with increase in atomic number from the beginning to the end of period 2. The maximum number of valence electrons possible in any outermost shell is 8.