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4.5 Isotopes and Atomic Mass
The number of protons, neutrons, and electrons is determined by the atomic number and mass of the atom.
Determine the number of protons, neutrons, and electrons in one or more of the isotopes of an element.
The atoms of the same element have the same number of protons and electrons.
The atoms of most elements have different numbers of neutrons.
The element magnesium has an atomic number of 12.
Every magnesium atom has 12 protons.
Some naturally occurring magnesium atoms have 12 neutrons, others have 13 and still others have 14.
The magnesium atoms have different mass numbers but do not change their behavior.
There is a left corner.
The name and symbol of an isotope can be followed by its mass number.
A large sample of naturally occurring magnesium atoms shows that each type of magnesium isotope can be present as a low percentage or a high percentage.
The amount of magnesium atoms in the sample is about the same as the amount of Mg-24, but the amount of Mg-25 and Mg-26 is less.
The atomic number 24 has 24 protons.
The number of neutrons is found by subtracting the number of protons from the mass of each isotope.
The formation of bones and teeth requires Vanadium.
There are two naturally occurring isotopes of vanadium.
The atomic mass is the number that is given below the symbol of each element on the periodic table.
The atomic mass on the periodic table is rarely whole numbers because most elements consist of two or more isotopes.
The periodic table shows the average mass of a sample of chlorine atoms, but no individual atoms have this mass.
There is a higher percentage of 17Cl atoms in the chlorine sample.
Atomic mass tABLE is a list of the naturally occurring elements and their atomic mass.
We can show how the most abundant isotope is determined for a sample.
The atomic mass of magnesium on the periodic table is 24.31.
The mass of magnesium is close to the mass of the three isotopes.
Magnesium has an atomic mass of 24.31 amu.
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