Period 4 element

The fourth period of the periodic table of the elements contains all the chemical elements that have exactly four electron shells in the atom. The innermost (first) electron shell is fully occupied and has two electrons. The second electron shell is also fully staffed and has eight electrons. The third electron shell has at least eight electrons and can hold up to 18 electrons. The outermost (fourth) electron shell, also called valence shell, can accommodate between one and eight electrons. Thus, a total of 18 chemical elements are in the fourth period.

Excerpt from the Periodic Table

Magic Number

The chemical elements calcium and nickel with an atomic number of 20 and 28 has in the ground state of the nucleus is more stable than neighboring nuclides. These special atomic numbers are called magic numbers.

Number of electrons in the electron shells

List

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8

  • Group of the periodic table
  • Period 4 element
Group (periodic table) Titanium Chromium Manganese Cobalt Zinc Germanium Arsenic Selenium Bromine Atomic nucleus Argon Period (periodic table) Period 1 element Period 2 element Period 3 element Period 6 element Period 7 element Period 8 element
181263
de