Saturday, August 13, 2011

Can someone help with grade 10 science?

I think "A" is the right answer. What the element is, is defined by the number of protons in the atom. You've probably read about the chains of decay of radioactive elements into non-radioactive ones such as lead. They emit both neutrons and protons, and every time an element loses a proton, the element is called by another name in the periodic table.

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