Atomic Structure

Atomic Structure

1. Top number= Protons plus neutrons

   • Bottom number= (Protons) Electrons

2. The Mr of a compound is the sum of the relative atomic masses of the atoms ( in grams ) known as one mole of that substances

3. Isotopes are atoms of an element with the normal number of protons and electrons, but different numbers of neutrons.

4. Gas Chromatography is the separation of a mixture of compounds

5. Mass spectrometer is used to identify a substance

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