Answer:
Any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
Another definition:
An element is the simplest pure substance which can neither be split nor built up from other simpler substances by chemical reaction
A. Jupiter. is the correct answer. Mark as brainliest please.
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Answer:
the mass number decreases by 4 and the atomic number decreases by 2
You need evidence to support a conclustion
