Describe how the properties of elements in the same group differ to the properties of elements in the same period.

All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell.

All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

4

Explanation:

Same group elements have the same physical properties and same elements in period have same chemical properties

fr8t7iot7o87oglgt87ot79p0[90

he would use the colour black