which list of elements contains only metal?

Question

- helium, carbon, gold

- sodium, chromium, copper

- iodine, iron, nickel

-phosphorous, nitrogen, oxygen

Answer 1

the row which contains only metals is - sodium, chromium, copper

 

on the periodic table, the elements in columns 1 and 2 on the left side of the table are all metals. The transition elements in the center of the table (between columns 2 and 4) are metals

Answer 2

 

Most elements on the periodic table are metals. Knowing this, a great way to approach this question would be with elimination - cross out all the choices containing at least one obvious nonmetal or noble gas.