12 3 4 5 6 7 8 9 10time remaining52: 51while developing his periodic table, dmitri mendeleev broke his own rule and placed the element tellurium before iodine in the group. he did this even though tellurium's atomic mass was known to be greater than iodine's. in his notes, mendeleev stated that he expected tellurium to have a lower atomic mass than iodine. however, all measurements continue to show that tellurium has a greater atomic mass than iodine even though tellurium acts like it has a lower atomic mass
what is the most likely reason that mendeleev placed tellurium before iodine?

The answer is A.    or Mendeleev observed that tellurium has chemical properties like other elements in its group, and he did not know that neutrons cause the greater atomic mass.

Explanation: This one makes the most sense and also I got a 100% on my quiz.

i just learnt this recently but i need to look through my notes again

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.