14. What does it mean if K atom becomes K+ ions?
A, it has lost 1 electron
C. it has gain 1 electron
B. it has lost 2 electrons
D. it has gain 2 electrons
15. Which is true about the elements in a particular group in the periodic table?
A. they have the same number of protons B. they have the same number of electrons C. they have the same number of energy levels
D. they have the same number of valence electrons
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ܛܣܣܛܓܐܥܗܙܝܗܨܟܣܩ݂ܣܬܨܛܙ ̮ܵܲܵ݇ܿܛܣ݂ܗܣܸ̮ܨܛܲܗܨܗܨ