chemistry

Which physical characteristic of a solution may indicate the presence of a transition element?

A. Its density
*B. Its color
C. Its effect on litmus
D. Its effect on phenolphthalein

 Which element has a crystalline lattice composed of positive ions through which electrons flow freely?

A. Bromine
*B. Calcium
C. Carbon
D. Sulfur

 Red litmus paper will turn blue when placed in an aqueous solution of

A. KCl
*B. KOH
C. CH
D. CH3COOH