What does the hand with a pointer mean when you put your mouse over the virtual volcano? a.
You are able to continue if you click your mouse.
c.
both of these
b.
You can watch the volcano erupt.
d.
neither of these

Thermohaline circulation and gyres

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts