The document provides information about structural formulas and condensed structural formulas of hydrocarbons: - A structural formula shows the arrangement of atoms in a molecule using lines to represent chemical bonds. - A condensed structural formula writes the structural formula in a shortened way, often omitting hydrogen atoms and some bonds to reduce clutter. - Examples of tasks involving writing structural formulas, condensed structural formulas, and naming hydrocarbons from their formulas are given. - The importance of knowing structural and condensed formulas is to understand hydrocarbon molecules and their bonding arrangements.

1. SCIENCE 9

4. Babylyn Realyn Shanelle Adrean Angel
Francis Leonel Kim Mildred Laurence
Charmae Joriel Ronalyn

5. Reymark Kyle Paulo Lairen Deniel Enrico
Ryanel Redjie Jerome Marivic Jemar
Jannah Arjay G. Jade Bea Julius Reymark D.

6. Jobert Cath Monicca Kyzelle Marian
Marian Dave Adriel Zaijan Randel
R-jay R. Kier Rommel

7. • 4 songs
• 2 Minutes
• Pass is not alllowed
• The Actors- Charades/ Acting
• The Musical Performers- Humming
• The Singers- Singing

9. Look at the given pictures. Using a Venn Diagram, compare and
contrast the two pictures. (English integration)

11. A structural formula consists of symbols for the atoms
connected by short lines that represent chemical bonds—one,
two, or three lines standing for single, double, or triple bonds,
respectively.

13. .
-the formula where the symbols of atoms are
listed in order as they appear in the molecule's
structure with bond dashes omitted or limited. While
vertical bonds are always omitted, sometimes
horizontal bonds are included to indicate polyatomic
groups

15. • Heptane
• 2-Heptene
• 2-Heptyne

17. Task: Write the structural formula of the following;
1. Pentane 2. 2-Pentene 3.1- Pentyne

18. Task: Name the hydrocarbons below using the given
structural formula.
1. CH3CH2CH2CH2CH2CH2CH2CH3
2. CH2CHCH2CH2CH2CH2CH3
3. CH3CH2CH2C2H3

19. Task: Write the condensed structural formula of the
following;
1. Pentane 2. 2-Pentene 3. 2-Pentyne

20. What is the importance of
knowing the structural and
condensed formula for
hydrocarbons?

22. • What are the different two
ways to express the
hydrocarbons?
• Differentiate structural and
condensed structural formula from
each other.

23. EVALUATION: 1.What is the condensed formula of this structure?
a. CH3CH2CH2CH2CH2CH3 b.CH3CH2CH3
c. CH3CH2CH2CHCH2CH3 d. CH3CH2CH2CH2CHCH3
2. The given structure is an example of;
a. Condensed Structural formula
b. Molecular formula
c. Structural formula
d. Empirical formula

24. 3. In a structural formula, __________ (is) are used to depict
two electrons in a chemical bond.
a. two small e- b. dots
b. . a single line d. none of these
4. What type of formula omits the carbon‐hydrogen bonds?
a. structural formula b. molecular formula
c. condensed structural formula d. none of these
5. Name the hydrocarbon using the structural formula below.
a. Butene b. Butane c. Ethane d. Hexane

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