Teadus igapäevaelus
Why are atoms different sizes?
A sodium atom is larger than a chlorine atom in the same period because effective nuclear attraction increases across the row.
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Lühike vastus
A sodium atom is larger than a chlorine atom in the same period because effective nuclear attraction increases across the row.
Mis tegelikult toimub?
Teadus jääb meelde, kui definitsioon seotakse millegi mõõdetava või vaadeldavaga.
Across period 3, atomic size generally falls while first ionization energy generally rises, with instructive exceptions.
Teadus jääb meelde, kui definitsioon seotakse millegi mõõdetava või vaadeldavaga.
Kasulik mõttepilt
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Atomic size reflects a competition between nuclear attraction, electron shielding and which shells are occupied. That is why radius changes systematically—but not perfectly smoothly—across the periodic table.