1.Which statement best describes an oxidation-reduction reaction?(1 point) A. a chemical reaction in which there are fewer products than reactants

B. a chemical reaction that involves oxygen

C. a chemical reaction in which electrons are released from the system

D. a chemical reaction in which electrons are transferred between reactants

2.Beryllium (Be) has four electrons. Fluorine (F) has nine electrons. Which chemical formula shows the correct subscripts for the product of the reaction when beryllium and fluorine combine?(1 point)

A. Be2F

B. BeF

C. Be2F2

D. BeF2

Use the reaction to answer the question.

2KCl → 2K + Cl2

Which type of reaction is shown?

(1 point)

A. combination

B. displacement

C. decomposition

D. combustion