檢視定比定律的原始碼

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| style="background: #008080" align= center|  '''<big> 定比定律</big> '''

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[[File:U=2812467880,3624590771&fm=26&fmt=auto.webp.jpg |缩略图|居中|[https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fwww.51wendang.com%2Fpic%2F63c6a368704dc314712fcf14%2F18-810-jpg_6-1080-0-0-1080.jpg&refer=http%3A%2F%2Fwww.51wendang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1641542343&t=fa437f35ad42d8253a0d6d965bd4f913   原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%AE%9A%E6%AF%94%E5%AE%9A%E5%BE%8B&step_word=&hs=0&pn=0&spn=0&di=163350&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2812467880%2C3624590771&os=1975752299%2C2597617691&simid=2812467880%2C3624590771&adpicid=0&lpn=0&ln=1919&fr=&fmq=1638950340052_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fwww.51wendang.com%2Fpic%2F63c6a368704dc314712fcf14%2F18-810-jpg_6-1080-0-0-1080.jpg%26refer%3Dhttp%3A%2F%2Fwww.51wendang.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1641542343%26t%3Dfa437f35ad42d8253a0d6d965bd4f913&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bc8ojg1wg2_z%26e3Bv54AzdH3F15vAzdH3Fmnvmwnmb0a91vn8908duvu89AzdH3F8b&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined&dyTabStr=MCw0LDMsNSwyLDEsNiw3LDgsOQ%3D%3D   来自 360 的图片]]]
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定比定律，即每一种[[化合物]]，不论它是天然存在的，还是人工合成的，也不论它是用什么方法制备的，它的组成元素的质量都有一定的比例关系，这一规律称为定比定律。于1799年由普劳斯特提出。换成另外一种说法，就是每一种化合物都有一定的组成，所以定比定律又称定组成定律。