Physics
Physics, 26.10.2020 23:10, bm42400

10. Which element has 2 valence electrons in its outermost energy level? a. Cesium
b. Magnesium
C. Boron
d. Argon

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10. Which element has 2 valence electrons in its outermost energy level? a. Cesium
b. Magnesi...

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