Chemistry, 17.02.2021 09:50 maijahmcleod61
I. Alege cuvântul potrivit dintre paranteze, astfel încât următoarele enunțuri să fie adevărate: 2p
• Atomul cu numărul atomic 19 și numărul de masă 39 conține ... neutroni (19/20).
• Elementul care are două straturi complet ocupate cu electroni este un ... (gaz rar/metal).
• Elementul cu simbolul P se numește ... (potasiu/fosfor).
• Aproape întreaga masă a atomului este concentrată în ... (nucleu/învelișul de electroni).
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I. Alege cuvântul potrivit dintre paranteze, astfel încât următoarele enunțuri să fie adevărate: 2p...
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