DIS Dhn - Chemistry - Grade-7
Sermin Sabnam
Senior Teacher, DIS EM Dhanmondi
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
In the scope of its subject, chemistry occupies an intermediate position between physics and biology. It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level. For example, chemistry explains aspects of plant chemistry (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the properties of the soil on the moon (cosmochemistry), how medications work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).
Last Update | 09/27/2020 |
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Completion Time | 1 hour 54 minutes |
Members | 24 |
Live Class
Start Time | 09/28/2020 03:30:33 |
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End Time | 09/28/2020 04:15:33 |
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Lecture-1
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1.01 Atoms, Elements and Compounds10 xp
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Atoms
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Periodic Table
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Compounds
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How to get percentage composition of a compound?
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Lecture-2
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1.02 More about atoms10 xp
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Structure of an Atom
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Relative atomic mass
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Masses of an atom
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1.01 and 1.02 Q/A
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Lecture-3
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1.03: Isotopes and Relative Atomic mass10 xp
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Isotopes
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Relative Atomic Mass
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Lecture-4
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1.04: How electrons are arranged?
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Electron Shells
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1.03 & 1.04 Q/A
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Lecture-5
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2.2 The Ionic bond
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Compound in Ionic Bond
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2.03 Ions
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2.02 Quiz10 xp
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2.02 Q/A
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