Gizmo Warm-up A chemical change, (or chemical reaction) occurs when one or more substances,
called reactants are n see, touch, or smell.
To begin, check that Reactant 1 is Sodium and Reactant 2 is Water. Sodium is a
metal so soft you can cut it with a knife.
1. Click Play ( ). What do you observe?

2. Do you think a chemical reaction has taken place? Explain.
A chemical reaction has

Which is true of the reactants in this displacement reaction? fe + 2hcl fecl2 + h2 a. the reactants are located to the left of the arrow in the chemical equation. b. the reactants contain 1 iron atom, 2 hydrogen atoms, and 1 chlorine atom. c. the reactants are the atoms, molecules, or compounds formed in the reaction. d. the reactants have the same physical and chemical properties as the products.

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Name the intersection of plane bpq and plane cpq.