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Atom Diagram - Parts of an Atom
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Atom Diagram - Parts of an Atom
Snemalna Knjiga Besedilo
Zdrs: 1
PROTON
The proton is found in the NUCLEUS of the atom. It has a relative charge of +1 and a relative mass of 1 amu.
Zdrs: 2
NEUTRON
The neutron is found in the NUCLEUS of the atom. It has a relative charge of 0 and a relative mass of 1 amu.
Zdrs: 3
ELECTRON
The electron is found outside the NUCLEUS of the atom. It has a relative charge of -1 and a relative mass of ~0 amu.
Zdrs: 4
ATOMIC NUMBER
The atomic number is 3.
The atomic number tells us the number of PROTONS in an atom. Since atoms have no charge, it also tells us the number of ELECTRONS in an atom.
Zdrs: 5
MASS NUMBER
The mass number is the sum of PROTONS + NEUTRONS in the atom.Since protons and neutrons each have a mass of 1 amu, their sum is the same as the mass.
Zdrs: 6
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What are the atomic number and mass number of this atom?
Zdrs: 0
The mass number is 7. 3 + 4 = 7
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