science 7 COMPOUND 1st Quarter

1. Substance Chemical
Formula
Elements
Present
A. salt NaCl Na and Cl
B. table sugar C12H22O11
C. water H2O
D. carbon
dioxide
CO2

3. Kalburo is made from sulfur, when kalburo
(sulfur) is exposed in air, it reacts with oxygen
gas forming sulfur dioxide (SO2) which is a
pungent and poisonous gas. If you continue to
inhale the gas produce by kalburo when
exposed to air, you will eventually get dizzy
because of exposure to the poisonous gas.

4. COMPOUND

5. COMPOUNDS ARE MADE UP OF TWO OR MORE
ELEMENTS THAT ARE CHEMICALLY COMBINED
PRODUCING A NEW SET OF PROPERTIES.

6. PROPERTIES OF COMPOUNDS:
1. Compounds cannot be separated into other
substances by physical methods but by
chemical means only.
Example: elemental component of water as
hydrogen and oxygen can only be separated by
electrolysis (a chemical process).

7. 2. Shorthand in writing compounds is
chemical formulas while elements are
chemical symbols.
Example, water - H2O (chemical formula)
hydrogen - H (chemical symbol)
oxygen - O (chemical symbol)

8. 3. Elements in compounds are always
combined in fixed proportions.

9. 4. Generally, compounds have chemical
names and common names.

10. Example below shows how compounds
are formed:

11. 5. Compounds are useful in our daily
needs.

13. Activity 1. Complete me!
Directions: Fill in the table below. Write
your answers in your science activity
notebook.

14. Pure Substance
(Common Name)
Chemical
Formula
Components
Present
Ratio Uses
Example: water H2O 2 Hydrogen
(H) and 1
Oxygen (O)
H:O
2:1
drinking,
washing,
watering,
cleaning
1. Sodium
Bicarbonate
(baking soda)
NaHCO3
2. Calcium
Carbonate
(chalk)
1 Calcium
(Ca)
1 Carbon (C)
3 Oxygen (O)
3. Table Sugar C12H22O11
4. Carbon dioxide C:O

15. MR. PUREY’S LAB
BY LEAH JOY A. DESAMPARADO

16. Inside the lab, I always do a great job.
Everything is in the right corner and always
in order.
I never mixed one that is different from the
other.
As you enter the room, all is perfect, not a

17. A red cabinet can be seen on the other
side of the corner
Where another pure substance, a
compound is placed in there
It can be broken down into simple type of
matter,

18. Composed of atoms of elements two or more
bonded together.
It has unique properties different from its
individual origins
Chlorine a poisonous gas when combine to
sodium.
A shiny metal turn into a table salt which in
cooking

19. Is it in the blue cabinet or somewhere
between rust, salt, and alcohol?
I am a water, made up of hydrogen and
oxygen
they say I am a compound if you agree,
in the red cabinet is where I should be.

20. You just made a good job!
An apprentice I never had always bear in
mind
there are two types of substance inside my
lab
the simplest matter is the element.
And a compound that can be broken down

21. What are the two substances
mentioned in the poem?
What are the properties of an
element?
What are the properties of a compoun

22. ACTIVITY 2: WHICH ARE ELEMENTS?
WHICH ARE COMPOUNDS?
Direction: Inside the box are the substances
that are found in the cabinet. Classify which
among them are elements ad compounds
and complete the template below the box.
Copy and fill the template below:

23. Iron Sodium Cloride (Salt) Sulfur
Carbon
Magnesium Sugar Oil
Copper Aluminum Distilled
Water Chlorine Baking Soda