CHEMICAL REACTIONS

During a chemical reaction,

• atoms are destroyed

• atoms are rearranged

• elements are destroyed

• new elements are produced

A chemical reaction is a process in which

• all reactants change state

• products change into reactants

• the law of conservation of mass applies

• all of these

What determines an atom’s ability to undergo chemical reactions?

• protons

• neutrons

• innermost electrons

• outermost electrons

How is a chemical equation balanced?

• changing subscripts

• erasing elements as necessary

• adding coefficients

• adding elements as necessary

What are the products in the equation below?

Zn + CuSO₄ -----> ZnSO₄ + Cu

• Zn and Cu

• Zn and CuSO₄

• ZnSO₄ and Cu

• Zn only