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15
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How do you calculate the number of neutrons in an atom?
Mass number - atomic number
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15
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What is the electron configuration of an atom with 11 electrons?
2,8,1
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15
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Which group does an atom with electron configuration 2,8,5 belong to?
Group 5
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15
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What is an isotope?
Atoms of the same element with different numbers of neutrons
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Why do isotopes have different mass numbers?
Because they have different numbers of neutrons
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15
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Can atoms with different numbers of protons be isotopes?
no
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15
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What is the atomic number of an element?
The number of protons in an atom
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15
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Where in the atom are electrons found?
In electron shells orbiting the nucleus
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15
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What part of the atom changes in an isotope?
The number of neutrons.
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lifesaver
Give 20 points!
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gift
Win 25 points!
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rocket
Go to first place!
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thief
Give points!
5
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25
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eraser
Reset score!
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shark
Other team loses 25 points!
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shark
Other team loses 20 points!
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thief
Give points!
5
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25
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trap
No points!
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fairy
Take points!
5
10
15
20
25
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rocket
Go to first place!
Okay!
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thief
Give points!
5
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15
20
25
15
×
What is the mass number of an atom with 17 protons and 20 neutrons?
37
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15
×
What two particles are found in the nucleus of an atom?
Protons and neutrons
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15
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Do isotopes of an element have the same number of protons?
Yes
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15
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Do isotopes have the same chemical properties?
Yes
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