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 |
Isotopes Chem quiz
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