Explain what the mass number and atomic number identify about an atom.
Use mass and atomic number to determine the number of each subatomic particle in an atom

Question

Explain what the mass number and atomic number identify about an atom.
Use mass and atomic number to determine the number of each subatomic particle in an atom

anonymous · Answer

@AlexandervonHumboldt2 @dan815 @e.mccormick @EclipsedStar @ganeshie8 @Hero @just_one_last_goodbye @lsherron @Michele_Laino @pooja195 @satellite73 @ribhu @SolomonZelman @zepdrix

ribhu · Answer

see.. protons = electrons
protons = atomic number
protons+ neutrons = mass number

ribhu · Answer

atomic number for proton determination and then mass number for neutron determination since we already know protons from atomic number..

anonymous · Answer

i dont understand the second part

ribhu · Answer

once u know atomic number.. u know the number of protons present.

ribhu · Answer

and when u know protons, u know the mass number... u can calculate the neutrons from last relation. and protons = electrons.. hence we can determine every sub atomic particle

ribhu · Answer

u understood?? or any doubt..u can ask me

anonymous · Answer

thank you

whpalmer4 · Answer

Knowing the number of protons does not give you the mass number unless you also know the number of neutrons.  You know the number of protons simply from knowing which element you have, but to know the number of neutrons you must know which isotope of that element you have, as many elements have multiple isotopes.