Chapter 3 rawr

Question 1

What is an element? Give an example.

Answer 1

See Page 53.

Question 2

Is water an element? Why or why not?

Answer 2

At the end of Page 53.

Question 3

Compare cells and elements.

Answer 3

First part of Page 54.

Question 4

How many elements are there? Name the two most abundant elements in the universe and all the abundant elements in the Earth’s crust and in the human body.

Answer 4

Last Part of Page 54.

Question 5

By scientific definition, do you think air, earth, fire, water, gold, and wood are elements?

Answer 5

Think About it Page 54.

Question 6

How are elements named? Give an example by using a table

Answer 6

Page 55.

Question 7

What are the cases and properties of chemical symbols?

Answer 7

First part of Page 56.

Question 8

What is a chemical reaction?

Answer 8

Key Points Page 56.

Question 9

Name the chemical symbols of Lead, Mercury, and Chlorine. Then, state their color, then whether they are solid/liquid/gas, and then whether they are shiny or not shiny.

Answer 9

Table 3.2 on Page 57

Question 10

State some properties that different elements vary in.

Answer 10

Last part of Page 57.

Question 11

How can elements be classified?

Answer 11

Pages 58-59.

Question 12

Who was the Russian scientist to arrange the known elements during his time?

Answer 12

Science Tidbit Page 59

Question 13

Try it Out Page 61.

Answer 13

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Question 14

What are some of the uses of elements?

Answer 14

Pages 62-63.

Question 15

What are most of the things around us made up of?

Answer 15

Page 63 - 3.3 - Last Para

Question 16

What is a compound? Give examples. How can the chemical reactions to form compounds be described? Give examples.

Answer 16

Pages 63-65.

Question 17

What are the substances not listed on the Periodic Table?

Answer 17

Page 63.

Question 18

State some of the similar properties of compounds. Give an example for each one.

Answer 18

Pages 66-68.

Question 19

How can we find the fixed proportion of the mass of an element?

Answer 19

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Question 20

Try it Out Page 68.

Answer 20

AHEM.

Question 21

Describe some ways we can form compounds. Give examples for each method of formation.

Answer 21

Pages 69 and 70.

Question 22

Try it Out Page 70.

Answer 22

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Question 23

Think About It Page 59

Answer 23

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Question 24

Answer the following questions:
a. Describe the discovery of elements.
b. What are the similarities between Helium and neon?
c. What happens when calcium carbonate is heated?
d. Write down the 4 chemical reactions.
e. What states are mercury and bromine at room temperature?
f. Who were the first chemists and what did they do?