1️⃣Alkali metal vs Alkaline earth metal2️⃣
Groups 1 and 2 sit side by side on the periodic table, both reactive metals, but their valence electron count sets them apart.
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1️⃣Alkali metal
- ✓Group 1, one valence electron
- ✓Forms +1 ions
- ✓Extremely reactive, soft, low density
- ✓Reacts violently with water
- ✓Examples: sodium, potassium, lithium
2️⃣Alkaline earth metal
- ✓Group 2, two valence electrons
- ✓Forms +2 ions
- ✓Reactive but harder and denser than Group 1
- ✓Reacts with water more slowly
- ✓Examples: magnesium, calcium, barium
Verdict
Alkali metals lose one electron and react violently; alkaline earth metals lose two and are a bit tamer. Both grow more reactive down their group.
Frequently asked
Which group is more reactive?+
Alkali metals are generally more reactive because losing a single electron is easier.
What charge do their ions carry?+
Alkali metals form +1 ions; alkaline earth metals form +2 ions.
Why store alkali metals in oil?+
They react so fast with air and water that oil keeps them isolated from moisture.
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