Answer:
1. one kind/single type, atom
2. two, different elements
3. symbols, letters
4. periodic table, atomic number
5. pure, (physical) properties
Explanation:
In no.1, the answer is not in the box, but that's the correct answer. But correct me if I'm wrong po.
Hope it helps (・∀・)
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Answers & Comments
Answer:
1. one kind/single type, atom
2. two, different elements
3. symbols, letters
4. periodic table, atomic number
5. pure, (physical) properties
Explanation:
In no.1, the answer is not in the box, but that's the correct answer. But correct me if I'm wrong po.
Hope it helps (・∀・)