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In the periodic table a column is the elements that go down the way.for exampleLiNaKRbCsFrThis is a column and called the Alkali metals. Group 1.A period is when it goes across.
Yes. Up and down
Yes. Atoms get larger as they move downward in a column of periodic table. This is because of increase in number of shells down the group.
A good example of periodicity would be the size of an atom which decreases across the Periodic Table but increases down the column
The number of valence electrons increases by one as you move down a group in the periodic table. Valence electrons are the electrons in the outermost energy level of an atom, and they determine the chemical properties of an element.
As you go down a column on the periodic table, the atomic size increases. This is because each subsequent element in the column has an additional energy level of electrons, leading to increased distance between the nucleus and the outermost electrons, resulting in larger atomic size.
There seems to be a typo in your question. If you meant a "horizontal row" (left to right) of the periodic table, those are called periods. If you meant a "vertical column" (up and down) of the periodic table, those are called groups.
The periodic law states that the properties of elements are periodic functions of their atomic numbers. This means that elements exhibit recurring patterns in their properties as you move across a row or down a column of the periodic table.
First off, there is no "salt" on the periodic table of the elements. Salt is a compound. However, you may be talking about "sodium". If that's the case, sodium is NOT in the same column as oxygen in the periodic table. Sodium is in the first column while oxygen is in the sixteenth column.
Atomic radius increases down a group. Metallic character also increases down the group.
The larger the highest energy level, the larger the atomic radius.
one should look for predictable changes and patterns