Name: Ashanti Reign V.
Tabalba Section: 9-Euler
Looking Back
In module 1, you have learned the arrangement of elements in the periodic table and describe an
element using their physical and chemical property. Let us see if you can still recall the concepts
discussed in SLeM 1.
A. Read each question below and explain your understanding of the previous topic by answering the
following questions on the right column.
Questions: Answers:
1. How do you identify an element? by looking for the element’s name or elemental
symbol also by looking for the element’s atomic
number.
2. What do you call the columns of elements in It is the group (also known as a family) is a
the periodic table? column of elements in the periodic table of the
chemical elements.
3. What is the other name for rows of elements It is called periods.
in the periodic table?
4. How do you determine the group or family to the periodic table is an arrangement of the chemical
which a representative element belongs? elements ordered by atomic number so that periodic
properties of the elements are made clear.
5. How do you determine the period to which an
element belongs?
B. Classifying Elements
Alkali metal: Rb
Alkaline earth metal: Ca
Metalloid: Ge
Halogens: Br
Transition metal: Fe
Noble gas: Ar
Activities
Activity 1: Morse Type Direction: There are two columns of phrases and terms given below. The first
column consists of phrases that may or may not be related to those on the second column which are
numbered I, II, and III. Write A if the item on the first column is related to me of the second column, B if
it is related to II, C if it is related to III, D if it is related to both I, II, and III, and E if the item is neither
related to I, II, nor III. Write your answer on another sheet of paper.
I. Alkali Metals III. Halogens
II. Alkaline Earth Metals
B 1. They form +2 or bivalent metal ions.
A 2. They are not usually found in their elemental state because they are very reactive.
A 3. They are soft enough to be cut with a knife.
C 4. Their name comes from a Greek word which means “saltproducing.”
B 5. They have distinctive and similar properties.
E 6. They are all colorless gases composed of single atoms at room temperature.
B 7. They are harder, denser, and melt at higher temperatures.
C 8. Their salts contain negatively charged ions known as anions.
A 9. They are not usually found in their elemental state because they are very reactive.
E 10. They lack chemical reactivity and generally do not react with common elements.
Activity 2: Properties and Uses of Common Chemical Products Direction: Complete the table below by
supplying the missing information. Write your answer on another sheet of paper.
1. used as disinfectant
2. copper
3. used as fertilizers.
4. source suitable for glass, optic and ceramic
applications.
5. metal oxides
6. used as emulsifiers.
7. used to prevent cavities.
8. Sodium Hydroxide.
9. potassium bicarbonate
10. used in photographic films and plates.
Checking Your Understanding
A. Exit Slip.
Directions: Write a reflective essay about your learning on the properties and economic uses of
common chemicals. Let your essay reveal how much you learned about the concept discussed in this
module. Indicate which concepts are the most Understood, slightly understood, and the least
understood ones. Provide another sheet of paper for your answer.
DID I LEARN MUCH OR LITTLE? Ive learned Much.
REFLECT: I’ve learned that there are so many economic uses of elements. In our everyday life we are
using some of it. And also ive learned the importance of each of them through out the lesson.
B. Concept Explanation.
Directions: Answer each question based on the given properties of chemicals.
1. Chlorine is a very important industrial chemical.
1.1. Why chlorine is normally produced on the same site where it is to be used?
- because it is made by small particles.
1.2. Name two important compounds made using chlorine and give one example of their economic
used.
A. Bleach - whitens and disinfects clothes and disinfects kitchen and bathroom surfaces.
B. Food- Energy help convert wind power into electricity.
2. Hydrochloric acid can be produced in excess quantities in the stomach, causing indigestion. Antacid
tablets often contain sodium bicarbonate (NaHCO3), which reacts with the acid to form a salt (NaCl),
carbon dioxide (CO2), and water (H2O).
2.1. What discomfort could be caused by the carbon dioxide (CO2) produced in the stomach?
- might feel stomach pain, farting and burping because of the excess carbon inside the body.
2.2. Based from the properties of Alkaline earth metals (Group IIA), what alternative antacid that would
not give the same problem?
- The Alkali metals
C. Crossword Puzzle
Direction: Fill the grid with the appropriate word or words described by the clues across and down.
1. Pottasium
2. Chemical
3. Chlorine
4. Ceramic
5. Flourine
6. Mercury
7. copper
8. Silver
9. Halogens
10. Freon
