Fill in the blank set 1

Question 1

a __________ is produced when 2 or more elements are chemically combined.

Answer 1

compound

Question 2

A __________ must take place in order to make or break a compound.

Answer 2

chemical reaction

Question 3

given an example of a compound

Answer 3

NaCl = salt

Question 4

Given an example of something that is not a compound

Answer 4

Neon

Question 5

A ________ ___________ is an arrangement of symbols and numbers that describe a compound

Answer 5

chemical equation

Question 6

___________ comes in front of the symbols in a chemical equation.

Answer 6

coefficient

Question 7

a ____________ is the small number that comes after the symbols in a chemical equation.

Answer 7

subscript

Question 8

What is a balanced equation?

a. N2+h2—NH3
b. 2Mg + O2—2MgO

Answer 8

b

Question 9

How many magnesium atoms are in the formula 2MgO

Answer 9

2

Question 10

How many silver tons are in the formula 3Ag3N

Answer 10

9

Question 11

What is the chemical formula for table salt?

Answer 11

NaCl

Question 12

Give an example of a physical change.

Answer 12

Something getting crushed

Question 13

Give an example of a chemical change

Answer 13

Burning

Question 14

A __________ _______ changes the appearance of a substance.

Answer 14

physical change

Question 15

A _________ ________ produces new substances with new properties.

Answer 15

chemical change

Question 16

All changes in phase or state are ________ _______.

Answer 16

physical change

Question 17

Ice melting is an example of a _______ change.

Answer 17

physical

Question 18

A ________ change does NOT produce a new substance.

Answer 18

physical

Question 19

Burning paper is an example of a _______ change.

Answer 19

chemical

Question 20

Iron rusting is a _________ change.

Answer 20

chemical

Question 21

A chemical change is sometime called a chemical __________.

Answer 21

formula

Question 22

Exploding fireworks is an example of a chemical _________.

Answer 22

change