軌き道どう電でん子し

き

ど

う

で

ん

し

Meanings

1

noun

orbital electron

Technical term in physics and chemistry for an electron bound to an atomic nucleus, moving in an orbital.

軌rut, wheel, track

道road-way, street, district

電electricity

子child, sign of the rat, 11PM-1AM

電でん子し
電子 is the general term for 'electron', while 軌道電子 specifically refers to an electron in an atomic orbital.
原げん子し軌き道どう
原子軌道 is the 'atomic orbital' itself, whereas 軌道電子 is the electron occupying that orbital.

Compound of 軌道 (orbit) and 電子 (electron), a direct calque from English 'orbital electron'.