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Use the Periodic Table to get Atomic number (19), and atomic mass (39.1).
The atomic number is the number of protons, and in the neutral atom, also the number of electrons: 19.
The Atomic Mass is the sum of the mass of the protons and neutrons, 39.1. Subtract the number of protons (use integers) from the atomic mass, 39 - 19 = 20, which is the number of neutrons.
Protons = 19
Neutrons = 20
Electrons = 19
What else can I help you with?
What is K2Cr2O2?
potassum dicromate
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Electricity is the flow of electrons
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Electrons with the least amount of energy are found were?
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When sunlight excited electrons in chlorophyll how do the electrons change?
the electrons gain a huge amount of energy
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the atomic number
What is the total amount of electrons and valence electrons in francium?
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