Answered

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6 The elements in Group 2 have similar chemical properties because each atom or these elements has the same
(1) atomic number
(2) mass number
(3) number of electron shells
(4) number of valence electrons

Sagot :

Nellz01
They have similar chemical properties because their atoms have the same number of electrons in the highest occupied energy level. So the answer is 4.
Hope this helps! :-)
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