Vim li cas rau kev tsim ntawm cov hluav taws xob dawb
Tus naj npawb ntawm cov hluav taws xob sab nraud ntawm cov hlau atoms feem ntau me me, thiab kev nyiam ntawm atomic nuclei tsis muaj zog. Thaum cov hlau hluav taws xob sib xyaw ua ke ua lub pob zeb siv hlau, cov hluav taws xob sab nraud tsis sib txawv los ntawm niam txiv atom thiab dhau los ua hluav taws xob dawb. Ntau, ntau lub tshuab hluav taws xob pub dawb tsim hluav taws xob huab (lossis hluav taws xob roj). Raws li qhov kev txiav txim ntawm cov hluav taws xob sab nraud, hluav taws xob dawb muaj peev xwm yauv tau txais kev taw qhia kom muaj lub zog hluav taws xob.