Kiû-koáiⁿ bô͘-hêng (Eng-gí: ball-and-stick model) sī chi̍t khoán hòa-ha̍k bu̍t-chit ê hun-chú bô͘-hêng, thang piáu-hiān kok goân-chú kap in chi kan kiat-ha̍p ê sam-chhù-goân hong-ūi.

Si̍t-thé bô͘-hêng.

Tī kiû-koáiⁿ-sek ê bô͘-hêng, goân-chú it-poaⁿ sī pián-hiān chò kiû-bīn, saⁿ kat goân-chú ê hòa-ha̍k kiat-ha̍p sī pián-hiān chò koáiⁿ-á hêng-thé. Goân-chú chiàu in só͘ sio̍k ê goân-sò͘, ū koàn-sì sú-iōng ê tāi-piáu sek-tī.