Atomic mass Boiling point Initial letter 2 . What property is used in the modern periodic table to sort the elements? Atomic number Mass number Boiling point Initial letter 3 . Group 1 elements are called... transition metals noble gases ...
3.3 The Atom. Periodic Table of Elements Atomic Number: Number of protons in an atom; usually appears directly above the chemical symbol. Number of protons. 2. What are isotopes? Use two particles from the table above to illustrate your answer. (3 marks) 17 O & 18 O (1) Same Atomic ...
General Trends of the Periodic Table Atoms are arranged by their atomic numbers. Fr is the most active Metal (botton left) – circle it F is the most active Nonmetal (top right, but not a noble gas)– circle it Size increases downward and to the left Now take the Online Quiz There ar...