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eMusic Study Pack • Chemistry
Student
📖 Comprehensive Note
Valency (valence) is the combining power of an element — the number of electrons an atom can lose, gain, or share when forming chemical compounds. It often corresponds to the number of electrons in the outer shell for main group elements and determines bonding patterns.
- Common valencies: H = 1, O = 2, N = 3 (commonly), C = 4
- Positive valency: atoms that lose electrons (metals)
- Negative valency: atoms that gain electrons (non-metals)
- Variable valency: transition metals (Fe²⁺, Fe³⁺ etc.)
🎤 Lyrics + Audio
Verse 1
Early mornings, books in hand,
Dreams ahead, a future planned.
Step by step, I climb so high,
Every effort helps me touch the sky.
Chorus
Valency is the
combining power of
an element,
that is, hmmm hmmm hmmm
the number of electrons
an atom can lose,
gain, or share when
forming a chemical
compound.
Verse 2
Study strong, let your mind ignite,
Hard work turns darkness into light.
Every lesson, every test,
Gives you knowledge, brings your best.
Chorus
Valency is the
combining power of
an element,
that is, hmmm hmmm hmmm
the number of electrons
an atom can lose,
gain, or share when
forming a chemical
compound.
Chorus
Valency is the
combining power of
an element,
that is, hmmm hmmm hmmm
the number of electrons
an atom can lose,
gain, or share when
forming a chemical
compound.
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📊 Line-by-Line Study Guide
| Lyric Line | Explanation |
|---|---|
| Valency is the combining power of an element | Defines valency as how an atom combines (loses/gains/shares electrons). |
| the number of electrons an atom can lose, gain, or share | Explains valency in terms of electrons involved in bonding. |
| Study strong, let your mind ignite | Encourages consistent study — ties into applying valency concepts in problems. |
💡 Mnemonic
V = VALENCE — Remember: Valency = Valence electrons involved in bonding (lose, gain, share).
❓ Quiz
1. What is valency?
2. What is the common valency of oxygen?
3. Carbon usually forms how many bonds (valency)?
🃏 Flashcards
Q1: Define valency
The combining power of an element — number of electrons an atom can lose, gain, or share.
Q2: Valency of sodium (Na)
1 (Na commonly loses one electron to form Na⁺).
Q3: Valency of chlorine (Cl)
1 (Cl commonly gains one electron to form Cl⁻).
🎯 Drag & Drop — Match element to valency
Drag each element into the correct valency box and click Check Matches.
Elements
H
O
C
Na
Cl
Valency boxes
Valency = 1
Valency = 2
Valency = 4
Tip: double-click a placed item to remove it.
📌 Summary
- Valency indicates how atoms combine — lose, gain, or share electrons.
- Common valencies: H (1), O (2), C (4), Na (1), Cl (1).
- Valency helps predict how elements bond to form compounds.