Atomic numbers
The atomic number Z of the first 36 elements, from hydrogen to krypton, period by period.
- 36 cards
- 4 topics
- Free
The outline, topic by topic
Each topic is weighted the way the exam weighs it.
- Period 1
- Period 2
- Period 3
- Period 4
A few cards from the deck
Which element has atomic number 1?
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Hydrogen (H)
Which element has atomic number 2?
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Helium (He)
Which element has atomic number 3?
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Lithium (Li)
Which element has atomic number 4?
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Beryllium (Be)
Which element has atomic number 5?
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Boron (B)
Which element has atomic number 6?
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Carbon (C)