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Atomic structure
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What part of the atom changes in an isotope?
The number of neutrons.
If two atoms have 6 protons, are they the same element?
Yes, they are both carbon.
Can atoms with different numbers of protons be isotopes?
no
Why do isotopes have different mass numbers?
Because they have different numbers of neutrons
What is the mass number of an atom with 17 protons and 20 neutrons?
37
What does the group number on the periodic table tell you?
The number of electrons in the outer shell
Which group does an atom with electron configuration 2,8,5 belong to?
Group 5
What is the electron configuration of an atom with 11 electrons?
2,8,1
Do isotopes have the same chemical properties?
Yes
Do isotopes of an element have the same number of protons?
Yes
What is an isotope?
Atoms of the same element with different numbers of neutrons
How do you calculate the number of neutrons in an atom?
Mass number - atomic number
What is the atomic number of an element?
The number of protons in an atom
What two particles are found in the nucleus of an atom?
Protons and neutrons
Where in the atom are electrons found?
In electron shells orbiting the nucleus
What is the charge of a proton?
Positive
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