periodic table ' periodic table valence electrons

The pairing of electrons is meant to represent that pairs of electrons are in separate orbitals within each energy level. Some books show them spread out this way and some show them in pairs. Note: In the energy level diagrams, the electrons are spread out evenly in the level.

Students will be able to interpret the information given in the periodic table to describe the arrangement of electrons on the energy levels around an atom. They will again try to correctly match the cards with each element. Students will be given cards with information about the electrons and energy levels for each of the first 20 atoms. Students will first look at a diagram and animation to understand the basic pattern of the arrangement of electrons on energy levels around an atom. Students will again focus on the first 20 elements. Atoms in the same column (group) in the periodic table have the same number of valence electrons.The electrons in the energy level farthest from the nucleus are called valence electrons.When the third energy level has 8 electrons, the next 2 electrons go into the fourth energy level.When the second energy level has 8 electrons, the next electrons go into the third energy level until the third level has 8 electrons.When the first energy level has 2 electrons, the next electrons go into the second energy level until the second level has 8 electrons.Each energy level can accommodate or “hold” a different number of electrons before additional electrons begin to go into the next level.The third is a little farther away than the second, and so on. The second energy level is a little farther away than the first. The first energy level is closest to the nucleus.An energy level represents the 3-dimensional space surrounding the nucleus where electrons are most likely to be.The electrons surrounding an atom are located in regions around the nucleus called “energy levels”.

Periodic table ' periodic table valence electrons