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Questions and Answers
Which of the following compounds is formed from a Group 2 metal and a Group 16 non-metal with a valency of 2?
Which of the following compounds is formed from a Group 2 metal and a Group 16 non-metal with a valency of 2?
- Aluminium Oxide ($Al_2O_3$)
- Potassium Iodide ($KI$)
- Sodium Chloride ($NaCl$)
- Magnesium Oxide ($MgO$) (correct)
Iron (II) and Iron (III) ions have the same charge magnitude but differ in sign.
Iron (II) and Iron (III) ions have the same charge magnitude but differ in sign.
False (B)
Write the chemical formula for a compound formed between Aluminium and Sulphate.
Write the chemical formula for a compound formed between Aluminium and Sulphate.
$Al_2(SO_4)_3$
The polyatomic ion $NO_3^-$ is called ______.
The polyatomic ion $NO_3^-$ is called ______.
Match the ion with its corresponding chemical symbol:
Match the ion with its corresponding chemical symbol:
Flashcards
What is a cation?
What is a cation?
A positively charged ion formed when an atom loses electrons.
What is an anion?
What is an anion?
A negatively charged ion formed when an atom gains electrons.
What is the sodium ion?
What is the sodium ion?
Ion with a +1 charge, commonly found in salt.
What is chloride?
What is chloride?
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What is carbonate?
What is carbonate?
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Study Notes
- Table 3.6 lists names and symbols of some ions.
Ions with Valency 1
- Sodium has the symbol Na⁺.
- Potassium is represented by K⁺.
- Silver's symbol is Ag⁺.
- Copper (I) is denoted as Cu⁺.
- Hydrogen is represented as H⁺.
- Hydride has the symbol H⁻.
- Chloride is represented by Cl⁻.
- Bromide is represented by Br⁻.
- Iodide is represented by I⁻.
- Ammonium has the symbol NH₄⁺.
- Hydroxide is represented by OH⁻.
- Nitrate's symbol is NO₃⁻.
- Hydrogen carbonate has the symbol HCO₃⁻.
Ions with Valency 2
- Magnesium has the symbol Mg²⁺.
- Calcium is represented by Ca²⁺.
- Zinc is represented by Zn²⁺.
- Iron (II) is denoted as Fe²⁺.
- Copper (II) is represented as Cu²⁺.
- Oxide's symbol is O²⁻.
- Sulphide is represented by S²⁻.
- Carbonate has the symbol CO₃²⁻.
- Sulphite is represented by SO₃²⁻.
- Sulphate has the symbol SO₄²⁻.
Ions with Valency 3
- Aluminum has the symbol Al³⁺.
- Iron (III) is denoted as Fe³⁺.
- Nitride has the symbol N³⁻.
- Phosphate's symbol is PO₄³⁻.
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