Part D In the PhET simulation window, click the green + symbols to expand the Ma

Question

Part D In the PhET simulation window, click the green + symbols to expand the Mass Number tab. Drag protons, neutrons, and electrons from their respective bins onto the area above them and notice how this affects the information displayed in each tab. For extra conceptual practice, click on the Game menu and test your knowledge on any difficulty rating. Rank the atoms represented by the following sets of subatomic particles from smallest to largest in terms of mass. Rank from smallest mass to largest mass. To rank items as equivalent, overlap them, 14 protons, 16 neutrons, 17 electrons 18 protons, 18 neutrons, 17 electrons 16 protons, 16 neutrons, 17 electrons 17 protons, 20 neutrons, 17 electrons 15 protons, 16 neutrons, 15 electrons Smallest mass Largest mass The correct ranking cannot be determined.

Explanation / Answer

we know that

mass number = number of protons + number of nuetrons

note that

the number of elctrons does not affect the mass number

so

for first case :

given

14 protons , 16 neutrons and 17 electrons

so

mass number = number of protons + number of nuetrons

mass number = 14 + 16

mass number = 30

for second case :

given

18 protons , 18 neutrons and 17 electrons

so

mass number = number of protons + number of nuetrons

mass number = 18 + 18

mass number = 36

for third case :

given

16 protons , 16 neutrons and 17 electrons

so

mass number = number of protons + number of nuetrons

mass number = 16 + 16

mass number = 32

for fourth case :

given

17 protons , 20 neutrons and 17 electrons

so

mass number = number of protons + number of nuetrons

mass number = 17 + 20

mass number = 37

for fifth case :

given

15 protons , 16 neutrons and 15 electrons

so

mass number = number of protons + number of nuetrons

mass number = 15 + 16

mass number = 31

so

the mass number order is

smallest   30 < 31 < 32 < 36 < 37 largest

so

the order is

smallest 14 protons <   15 protons    < 16 protons < 18 protons <   17 protons largest

-------   16 neutrons     16 neutrons      16 neutrons    18 neutrons     20 neutrons

-------- 17 electrons    15 electrons     17 electrons   17 electrons    17 electrons

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