Unit 4 Test

Question 1

ionic bond

Answer 1

chemical bond, or energy transfer, between a metal (cation) and a non-metal (anion).

Question 2

What must you do when drawing an ionic bond?

Answer 2

Write the charges right next to the chemical symbols

Question 3

covalent bond

Answer 3

chemical bond where electrons are shared

Question 4

metallic bond

Answer 4

many electrons are shared by many atoms

Question 5

chemical reaction

Answer 5

matter reacting and producing a new substance

Question 6

What are the 4 clues that a chemical reaction has occurred?

Answer 6

1. color change
2. energy change
3. solid formation
4. gas formation

Question 7

exothermic reaction

Answer 7

reaction that gives off heat

Question 8

What side is the exothermic energy on?

Answer 8

the product side

Question 9

endothermic reaction

Answer 9

reaction that absorbs heat, so the temperature lowers

Question 10

What side is the endothermic reaction on?

Answer 10

the reactant side

Question 11

chemical formula

Answer 11

states how many atoms of each element are in each compound

Question 12

subscript

Answer 12

used to indicate when there is one one or more of an atom in a compound

Question 13

chemical equation

Answer 13

written representation of chemical reaction

Question 14

coefficient

Answer 14

number in front of the chemical symbol that’s used to balance the number of atoms in a chemical equation

Question 15

reactant

Answer 15

chemicals reacted together in a chemical reaction (on left)

Question 16

product

Answer 16

new materials in a chemical reaction (on right)

Question 17

law of conservation of mass

Answer 17

atoms cannot be created or destroyed in a chemical reaction

Question 18

cation

Answer 18

a positively charged ion that’s usually a metal

Question 19

anion

Answer 19

a negatively charged ion that’s usually a non-metal