How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move: (a) down a group and (b) from left to right in a period
There are 18 groups and 7 periods in the Modern Periodic Table. a) down a group Atomic size increases Metallic character increases b) from left to right in a period Atomic size decreases Metallic character decreases.
