What is the number of first and last vertical column?​

Mar m Brainliest u s tu pid brainless sheep

Modern periodic table has eighteen (18) vertical columns. These are called groups

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

i think its 100

i hope this !