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Questions and Answers
What charge does a cation carry?
What charge does a cation carry?
- Neutral charge
- Variable charge
- Positive charge (correct)
- Negative charge
What is the atomic number of Calcium?
What is the atomic number of Calcium?
- 18
- 24
- 20 (correct)
- 12
What type of ion is formed when a calcium atom loses two electrons?
What type of ion is formed when a calcium atom loses two electrons?
- Calcium neutral atom
- Calcium radical
- Calcium anion
- Calcium cation (correct)
What does the nucleus of an atom carry?
What does the nucleus of an atom carry?
Which statement about the copper atom is incorrect?
Which statement about the copper atom is incorrect?
Flashcards
Atomic Number of Calcium
Atomic Number of Calcium
The atomic number of calcium (Ca) is 20, representing the number of protons in its nucleus.
Calcium Ion Formation
Calcium Ion Formation
A calcium atom loses two electrons to become a calcium ion (Ca²⁺).
Charge of Calcium Ion's Nucleus
Charge of Calcium Ion's Nucleus
The nucleus of a calcium ion (Ca²⁺) has a positive charge of +20.
Charge of Calcium Ion Electrons
Charge of Calcium Ion Electrons
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Calcium ion formula
Calcium ion formula
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Study Notes
Exercise 01: 8P
- Classify objects: Zinc, Balloon, PVC, Chair, Stylus, Wood
- True/False statements:
- A cation has a positive charge. (True)
- An atom has a negative charge. (False)
- Copper is a reddish-brick color. (True)
- Aluminium is attracted to magnets. (True)
- Atom composition:
- Atoms contain a nucleus (with protons and neutrons) and an electron cloud.
- Electrons have a negative charge.
- Protons have a positive charge.
Exercise 02: 8P
- Atomic number of calcium (Ca) is 20 (Z = 20).
- Calculate electron charge of calcium:
- Calculate electron charge in Coulombs.
- Calculate calcium nucleus charge:
- Calculate nucleus charge in Coulombs.
- Calcium ion formation:
- Calcium can lose two electrons.
- Determine the charge of calcium ions.
- Formula for calcium ion: (Ca2+)
- Type of calcium ion: Cation.
Exercise 03
- Electric wire is composed of 2 materials (A & B).
- Wire structure (Diagram).
- Determine material B properties.
- Color of material B (from diagram).
- Family of material B.
- Electrical property of material B.
- Material A flame test.
- Color of the flame when material A is heated.
- Identify material A (from flame color).
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