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All have the same number of protons, all have the same number of electrons
But they have different numbers of neutrons
Isotopes
are atoms that have the same number of protons but different number of neutrons
Isotopes of the same element have the same atomic number but
different mass numbers (neutrons)
isotopes are chemically alike because
they have identical numbers of protons and electrons, which are the subatomic particles responsible for chemical behavior
The number of neutrons in isotopes of an element does not change which element it is because the
atomic number does not change
The nuclides I-131 and I-133 are classified as
isotopes of the same element
Atoms of different isotopes of the same element differ in their total number of
Neutrons
What is the structure of a krypton-85 atom?
36 electrons, 36 protons, and 49 nuetrons
An isotope of which element has an atomic number of 6 and a mass number of 14?
Carbon
An atomic mass unit (1 amu) is defined as
1/12 of the mass of a atom
1 amu is approximately equal to
The mass of a single proton or neutron
Atomic mass can be calculated from the mass and the abundance of
naturally occurring isotopes
A weighted average (atomic mass) takes into account the fa that we do not have
equal numbers of all the objects
A weighted average is calculated by
Multiplying the percentage of the object (as a decimal number) by its mass for each object and adding the numbers together
Atoms of different isotopes of the same element differ in their total number of
Neutrons
Which notations represent hydrogen isotopes
1/1H and 2/1 H
The atomic mass of titanium is 47.88 atomic mass units. The atomic mass represents the
Weighted average mass of all naturally occurring isotopes of Ti
