Elements with complete outer energy levels are noble, which means that they will not bond with other elements. They are not (normally) reactive.
The electron energy levels.
the period number tells which is the highest energy level occupied by the electrons
i dont idgaff
Hydrogen is the element in question here. Hydrogen is one of the most widely used elements on the periodic table.?æ
all the elements in period 1 have one energy level, all the elements in period 2 have two energy levels, all the elements in period 3 have 3 energy levels... and so on
The atom of an element in the third period of the Periodic Table has 3 energy levels and so on. Also, atoms of elements in the same group have the same no. of valence electrons.
Noble gases.
The number of energy levels is equal to the period number of the element. Through a group, the number of energy levels increases. All the elements in a period has the same number of energy levels.
All elements have energy levels, but they are never described as unfolded. The energy levels are like layers, similar to how a gobstopper has different layers of color. They cannot be unfolded.
The electron energy levels.
the period number tells which is the highest energy level occupied by the electrons
i dont idgaff
the group number shows the number of electrons in the outermost energy levels. forexample sodium (Na) have 1 electron in the outermost shell and is placed in the group 1. Elements are grouped in rows depending on their energy levels, or valence electron numbers. Columns of elements are those that are chemically similar, or react
Hydrogen is the element in question here. Hydrogen is one of the most widely used elements on the periodic table.?æ
all the elements in period 1 have one energy level, all the elements in period 2 have two energy levels, all the elements in period 3 have 3 energy levels... and so on
The noble gases (helium, neon, krypton, xenon, radon) have complete outer electron shells, and the halogens (fluorine, chlorine, bromine, iodine, astatine) have almost complete outer electron shells. Note that the chemical properties of an element with a complete outer shell are tremendously different from the chemical properties of an element with an almost complete outer shell.
All elements in the 4th period (elements with atomic number 19 to 36) have four energy levels.