Selenium. As you go across the groups, not counting the transition metals, a valence electron is added.
Phosphorus (P) is in period 3 of the periodic table and has 5 valence electrons.
Boron has 3 valence electrons.Boron has 3 valence electrons.
Boron has 3 valence electrons.
Boron has 3 valence electrons out of five total electrons.
Aluminum, element number 13. You can tell how many valence electrons an element has by looking at its group (column). This rule only applies for the metals and nonmetals, however. In other words, columns IA, IIA, (skip the middle section starting with Sc and ending with Zn) IIIA, IVA, VA, VIA and VIIA have 1, 2, 3, 4, 5, 6 and 7 valence electrons, respectively.
The representative element in period 4 with 3 valence electrons is phosphorus.
Phosphorus (P) is in period 3 of the periodic table and has 5 valence electrons.
Boron has 3 valence electrons.Boron has 3 valence electrons.
Boron has 3 valence electrons.
Boron has 3 valence electrons out of five total electrons.
They have 3 valence electrons unless they are isotopes.
Group No = No.of valence electrons in the outer configuration period No = principle quantum No.(n)of the last shell of outer configuration Eg:carbon EC=1s2 2s2 2p2 No.of valence electrons=4, indicates G.No.is IV n=2, indicates period No. is 2 chlorine EC=3s2 3p5 valence electrons=7,so G.No. is VII n=3,so period No is 3
Aluminum, element number 13. You can tell how many valence electrons an element has by looking at its group (column). This rule only applies for the metals and nonmetals, however. In other words, columns IA, IIA, (skip the middle section starting with Sc and ending with Zn) IIIA, IVA, VA, VIA and VIIA have 1, 2, 3, 4, 5, 6 and 7 valence electrons, respectively.
The expected number of valence electrons for a group 3A element is 3. These elements have three valence electrons because they are located in group 3A of the periodic table, which corresponds to the third column from the left.
What has three energy levels and six valence electrons
What has three energy levels and six 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.