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14-10-2020
Biology

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Which two of the three elements have SIMILAR CHEMICAL PROPERTIES (valence electrons)?
1. Li - Na - Mg
2. F - Br - O
3. P - As - Se
4. Ra - Ba - Cs

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14-10-2020

Answer:

1. Li - Na

2. F - Br

3. P - As

4. Ra - Ba

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