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McClinton, Debbie
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Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements
- Resource Type:
- Others
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Others
Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements Atomic weights
- Resource Type:
- Others
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Others
Learners examine how the boiling point increases with increasing pressure. An example from industry is given.
- Subjects:
- Chemistry
- Keywords:
- Boiling-points
- Resource Type:
- Others
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Others
In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.
- Subjects:
- Chemistry
- Keywords:
- Molecular weights Atomic weights
- Resource Type:
- Others
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Others
Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.
- Subjects:
- Chemistry
- Keywords:
- Chemical elements Atomic weights Copper
- Resource Type:
- Others
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Others
Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.
- Subjects:
- Chemistry
- Keywords:
- Chemistry -- Mathematics Chemical structure
- Resource Type:
- Others
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Others
Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.
- Subjects:
- Chemistry
- Keywords:
- Molecular weights Chemistry Physical theoretical
- Resource Type:
- Others
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Others
Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.
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Others
In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.
- Subjects:
- Chemistry
- Keywords:
- Intermolecular forces Molecules
- Resource Type:
- Others
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Others
Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).
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