Science Unit 4 Test Review

What do metal elements do in chemical bonding?

Donate electrons.

What do nonmetal elements do in chemical bonding?

Accept electrons.

What type of bond is formed between a metal and a nonmetal?

Ionic bond.

What type of bond is formed between two nonmetals?

Covalent bond.

What type of bond is formed between two metals?

Metallic bond.

What happens to valence electrons during a reaction between a metal and a nonmetal atom?

They are transferred, resulting in an ionic bond.

What is the balanced equation for the reaction of potassium and chlorine?

3K + Cl2 = 3KCl.

In the reaction 3K + Cl2 = 3KCl, what is the coefficient for K?

What does the subscript in the equation 3K + Cl2 = 3KCl represent for Cl?

What are the reactants in the equation 3K + Cl2 = 3KCl?

3K + Cl2.

What are the products in the equation 3K + Cl2 = 3KCl?

3KCl.

What does the law of Conservation of Mass state regarding chemical reactions?

Matter is neither created nor destroyed; the mass of products equals the mass of reactants.

What occurs during an endothermic reaction?

Heat is absorbed.

What occurs during an exothermic reaction?

Heat is released.