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Worksheet in General Chemistry 1

This document is a worksheet for a general chemistry class. It contains questions to classify examples as elements, compounds, or mixtures. It also contains questions to identify physical and chemical changes. Finally, it asks students to complete a table with atomic number, mass number, and other properties for given elements and to answer additional questions about atomic structure.

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zyra mae garcia
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252 views4 pages

Worksheet in General Chemistry 1

This document is a worksheet for a general chemistry class. It contains questions to classify examples as elements, compounds, or mixtures. It also contains questions to identify physical and chemical changes. Finally, it asks students to complete a table with atomic number, mass number, and other properties for given elements and to answer additional questions about atomic structure.

Uploaded by

zyra mae garcia
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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WORKSHEET

IN
GENERAL
CHEMISTRY 1

Name: ________________
Section:_______________
I. Classification of Matter
Direction: Classify each of the following as element,
compound, or mixture.

1. Table sugar ______________________


2. Shampoo ______________________
3. Copper wire ______________________
4. Stainless steel ______________________
5. Soap _______________________
6. Air _______________________
7. Milk _______________________
8. Vinegar _______________________
9. Wine _______________________
10. Ice _______________________
11. Charcoal _______________________
12. Diamond _______________________
13. Aluminum Pan _______________________
14. 18 karat gold ring _______________________
15. Water _______________________

II. Physical and Chemical Change


Direction: Identify whether each of the following processes
involves a physical change or chemical change.

1. Fireworks _______________
2. Melting of ice _______________
3. Mixing of water and alcohol _______________
4. Spoiling of foods _______________
5. Cutting of diamonds _______________
6. Rusting of nails _______________
7. Burning of paper _______________
8. Decaying of leaves _______________
9. Drying of clothes _______________
10. Chopping of woods _______________

III. Complete the table


Direction: Use periodic table and give the atomic number,
mass number, number of protons, number of neutrons, and
number of electrons contained in each element.

Symbol Atomic Atomic No. of No. of No. of


of Number Weight Protons Electrons Neutrons
Atom

Bi

Cs

Hg

V
Answer the following:
1. An atom is identified as americium 243 with 95 electrons.
a. Write the symbol of the atom using with their atomic
number and atomic weight (use subscript and
superscript).
b. What is the atomic number of Americium?
c. How do you call 243?
d. How many protons and neutrons does americium
possess?
2. What is the relationship between the atomic number
and the number of protons in an atom?
3. How do you determine the number of neutrons in an
atom?
4. When is an atom considered electrically neutral?

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