WHY are elements in the periodic table group's, have similar properties.?

Question

please include why

Answer 1

electrons is the outer shell are the same in each group.

Answer 2

Elements are made of protons, neutrons, and electrons. The # of protons determines the atomic number. The elements are listed in the periodic table according to atomic number. Elements are grouped by column according to a certain characteristic of their electrons. The columns designate the number of electrons in the outermost (active) shell. When the outermost shell is complete (max # electrons possible), the element is very stable (Noble Gases). However, when the shell is incomplete the element wants to react, but the way it reacts depends on the number of electrons missing from the shell. So, the elements in the same colums tend to react similar to each other.

Answer 3

The periodic law as laid down by Dmitri Mendeleyev in the mid-19th century is that the properties of the elements are a periodic function (that means that they keep coming back again and again) of their atomic weights. Nowadays, we know that it's a function of their atomic numbers. So if you lay out the elements in a row, and if you keep interrupting the row to wind the elements back upon one another again and again, you get a grid that has elements of similar properties in each column.

Answer 4

All the elements in the same family have the same valence - the number of electrons or the number of empty spaces in the outside shell of their atoms. This means that all the elements in a family will combine with the same elements and in the same proportions. This gives them similar properties. For instance, the halogen family (halogen means salt-former), Fluorine, Chlorine, Bromine, Iodine and Astatine will all form compounds with Sodium and all of those compounds will consist of one Sodium atom and one halogen atom. Oxygen and Sulfur are in another family. Oxygen will combine with Hydrogen to form H2O while Sulfur and Hydrogen combine to form H2S.

Answer 5

The valence electrons (electrons in the outmost shell) of an element determine its properties. All the elements in the same group have the same number of valence electrons. They determine how stable the element is and how it will react.

Answer 6

they have the comparable valence variety. this means that each and everybody components in group a million have a million unpaired electron on the outer shell. Are you purely curious or are you engaged on a lab or somethin? reason throw electronegativity in all this and another residences and it gets somewhat extra puzzling.

Answer 7

Because all of the elements in the universe comes from single source. Some call it God, or the big bang theory or matter, energy.