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20
×
An atom has 12 protons and 13 neutrons. Calculate its mass number
A=Z+N=12+13=25
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10
×
An atom has 11 protons. How many electrons does a neutral atom have?
11 electrons
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25
×
An atom has a mass number of 23 and 11 protons. How many neutrons does it have?
N=A-Z=23-11=12 neutrons
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seesaw
Swap points!
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gift
Win 15 points!
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×
gift
Win 20 points!
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lifesaver
Give 15 points!
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lifesaver
Give 15 points!
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fairy
Take points!
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25
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shark
Other team loses 25 points!
Okay!
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thief
Give points!
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25
25
×
An atom has 20 protons and 20 neutrons. What is its mass number?
A=Z+N=20+20=40
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20
×
An atom has 13 protons and 14 neutrons. Calculate its mass number.
A=Z+N=13+14=27
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20
×
An atom has 8 protons, 8 electrons and 8 neutrons. How many particles are in its nucleus?
16 particles (protons and neutrons)
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25
×
An atom has 7 neutrons and 7 electrons and is neutral. Calculate its number of protons and mass number.
Number of protons = number of electrons =7. //Â A=Z+N=7+7=14
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banana
Go to last place!
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seesaw
Swap points!
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fairy
Take points!
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25
×
baam
Lose 20 points!
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15
×
An atom has 19 protons and 20 neutrons. How many electrons are present if the atom is neutral?
Number of electrons = number of protons= 19
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10
×
An atom has 16 protons, 16 neutrons, and 16 electrons. How many particles does the atom contain altogether?
16+16+16=48 subatomic particles
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