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1. Element S and i have the same of valence electron 2. element Cl and i have the same of valence electron 3.element Cu and i have the same number of energy level 4. Element He and i have similar chemical
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1. Element S and i have the same of valence electron

2. element Cl and i have the same of valence electron
3.element Cu and i have the same number of energy level
4. Element He and i have similar chemical properties
5. Element Na and i have similar chemical properties

User Wen W
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2 Answers

6 votes
Elements that are in the same column, or group of the periodic table, have the same number of valence electrons.
User Mark D Drake
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3 votes

Answer:

Step-by-step explanation:

asd

User Liran Cohen
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