Along each row of the periodic table,
Aatomic mass increases from left to right.
Batomic mass decreases from left to right.
Catomic mass is the same for all elements in the row.
Datomic mass changes in no set pattern.
Aatomic mass increases from left to right.
Batomic mass decreases from left to right.
Catomic mass is the same for all elements in the row.
Datomic mass changes in no set pattern.