Elements tend to decrease in metallic properties

pls answer fast pls pls pls

yes

Explanation:

the metallic properties of elements tends to decrease across a period and increase down a group.

yes

Explanation:

elements having low elctronegativity tend to have more metallic properties

1.solid

2.carbon dioxide

3.helium

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.