Answer:
All elements are made up of atoms. Atoms are made up of protons, neutrons, and electrons. Two different kinds of atoms can combine to form a compound.
118 elements.
Dmitri Ivanovich Mendeleev.
Explanation:
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1.
2.
All elements are made up of atoms. Atoms are made up of protons, neutrons, and electrons. Two different kinds of atoms can combine to form a compound.
3.
118 elements.
4.
Dmitri Ivanovich Mendeleev.
Explanation:
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