Grade 9 Chemistry

After completing this unit, you will be able to:

- comprehend Dalton’s atomic theory and modern atomic theory;

- understand the discovery of the electron and the nucleus;

- know the terms like atomic number, mass number, atomic mass, isotope, energy

level, valence electrons, and electron configuration;

- understand the Dalton, Thomson, Rutherford, Bohr and the quantum mechanical

atomic models;

- develop skills in:

– determining the number of protons, electrons, and neutrons of atoms from

atomic numbers and mass numbers,

– calculating the atomic masses of elements that have isotopes,

– writing the ground-state electron configurations of atoms using sub-energy

levels and drawing diagrammatic representations of atoms; and

E demonstrate scientific inquiry skills: observing, comparing and contrasting,

communicating, asking questions, and applying concepts.

After completing this unit, you will be able to:

- understand the periodic classification of the elements;

- develop skills in correlating the electron configuration of elements with the

periodicity of the elements, and in predicting the trends of periodic properties

of elements in the periodic table;

- appreciate the importance of classification in chemistry; and

- demonstrate scientific inquiry skills: observing, inferring, predicting, classifying,

comparing and contrasting, making models, communicating, measuring, asking

questions, interpreting illustrations, drawing conclusions, applying concepts,

and problem solving.

After completing this unit, you will be able to:

- discuss the formation of ionic, covalent, and metallic bonds;

- know the general properties of substances containing ionic, covalent, and

metallic bonds;

- develop the skills of drawing the electron-dot (Lewis structures) for simple

ionic and covalent compounds;

- understand the origin of polarity within molecules;

- appreciate the importance of intermolecular forces in plant and animal life;

- understand the formation and nature of intermolecular forces; and

- demonstrate scientific inquiry skills: observing, predicting, making model,

communicating, asking questions, measuring, applying concepts, comparing

and contrasting, relating cause and effects

After completing this unit, you will be able to:

- understand the fundamental laws of chemical reactions and how they are

applied;

- develop skills in writing and balancing chemical equations;

- understand energy changes in chemical reactions;

-  know types of chemical reactions;

-  develop skills in solving problems based on chemical equations (mass-mass,

volume-volume and mass-volume problems);

-  develop skills in determining limiting reactant, theoretical yield, actual yield,

and percentage yield;

- understand oxidation-reduction reactions and analyze redox reactions by specifying

the oxidizing agents and reducing agents, the substance reduced or oxidized;

-  understand the rate of chemical reaction, the state of a chemical equilibrium

and factors affecting them; and

-  demonstrate scientific enquiry skills: observing, inferring, predicting, classifying,

comparing and contrasting, communicating, measuring, asking questions,

designing experiments, interpreting data, drawing conclusions, applying concepts,

relating cause and effect, and problem-solving.