Up and down.
Electronegativity generally decreases as you go down a group on the periodic table due to the increasing distance between the nucleus and valence electrons, reducing the attractive force. Across a period, electronegativity generally increases due to the increasing nuclear charge, pulling valence electrons closer and increasing their attraction.
Elements in the periodic table are arranged in periods (rows) and groups (columns). Atomic number increases as you move across a row or period. The period number of an element signifies the highest unexcited energy level for an electron in that element. Elements within a group share several common properties. Groups are elements have the same outer electron arrangement. The outer electrons are called valence electrons.
Periods on the periodic table go across and are based on the number of unexcited electrons increasing as you read across. Groups on the periodic table are read down the table and share the same number of valence electrons.
Reactivity generally increases as you move from right to left across a period and from top to bottom down a group on the periodic table. This is because elements on the left side of the table have fewer electrons in their outer shell, making them more likely to lose electrons and react with other elements.
As with any grid, the periodic table has rows running left to right, and columns running up and down. The rows are called PERIODS and the columns are called GROUPS.
THEY GO ACROSS NOT UP AND DOWN. THAT IS FOR COLUMNS.
Is the Periodic Table. The columns down are the GROUPS The lines across are the PERIODS.
No that would be rows. Columns go down.
In the modern Periodic Table ;- #1 ; Groups are the columns down. #2 ; Periods are the lines across.
The density properties generally change as you go down the columns of the Periodic Table by increasing.
groups on the periodic table are the vertical coumns that go up and down. A period on the periodic table are the rows that go horizontal or across.
Rows go across and columns go up and down.
The periodic table has 7 rows and 32 columns.
The melting temperature properties generally change as you go down the columns of the Periodic Table by decreasing for metals and increasing for non-metals.
His original 1869 table had the atomic weights increasing down columns, and family members alongside each other in horizontal rows. His revised and greatly improved 1871 version had atomic weights increasing across rows, and element families in vertical columns, essentially similar to the way a modern Periodic Table is presented.
Electronegativity increases across (left to right) the periodic table and decreases on going down.
Columns are vertical, so go up and down. The first column is column A, the second column B and so on. You will see these at the head of the columns. Rows go across and are numbered.