Answer:
False
Explanation:
Physical properties within a group are more alike than [physical properties within a period. Let's take sodium as an example. Sodium is in group one, it is a metal that is rather soft (can be cut with a knife), low density, shiny, good conductor of electricity and heat. The properties listed are shared by all the elements in group one.
Now compare this with elements in the same period as sodium. Phosphorus and argon couldn't be more different to sodium. they are non-metals, poor conductors of heat and electricity. They bear no metalic character at all. The ones that do like magnesium and aluminium are not soft like group 1 metals are.
