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28 November, 21:14

Question 1

Elements in the same period have the same __.

valence electron

electrons

atomic number

valence shell number

Question 2

Which element has the greatest reactivity? (Refer to a periodic table)

Phosphorous (P)

Chlorine (Cl)

Sodium (Na)

Lithium (Li)

+3
Answers (2)
  1. 28 November, 23:09
    0
    C. atomic number and D. Lithium
  2. 29 November, 01:03
    0
    C. Atomic number have the same period
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