Why should someone or a country Join the united nations?

What is the chemical symbol of the element located in the 5th period that naturally occurs as a diatomic solid?

Examine these two paintings that depict famous events from american history. the image on the left, painted in 1940, shows the signing of the u.s. constitution in 1787. the image on the right, painted in 1836, shows the american victory at the battle of yorktown in 1781.which of these paintings should be considered a secondary source?

In witch form of government do delegates speak on behalf of citizens