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Title: Wilangan atom
Content: Wilangan atom, nomer atom utawi nomer proton (simbol Z) saking satunggil datu kimia punika akéh proton sané kacunduk ring inti atom. Akéh nyané idéntik sareng akéh muatan ring inti. Wilangan atom sacara unik nguningayang datu kimia. Ring atom sané nénten mamuatan, wilangan atom ipun pateh sareng akéh éléktron nyané.