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.
Kratek odgovor
A sodium atom is larger than a chlorine atom in the same period because effective nuclear attraction increases across the row.
Kaj se v resnici dogaja?
Znanost si lažje zapomnimo, ko definicijo povežemo z nečim merljivim ali opazljivim.
Lastnosti, kot sta atomski polmer in ionizacijska energija, kažejo ponavljajoče se trende v periodnem sistemu. To so splošne smeri, ne pravila brez izjem.
Lastnosti, kot sta atomski polmer in ionizacijska energija, kažejo ponavljajoče se trende v periodnem sistemu. To so splošne smeri, ne pravila brez izjem.
Uporabna miselna slika
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.