Which of the following elements will form positive ions? Check all that apply.
Na
z
Cu
Br

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which type of fossil does this image depict?

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)