All elements are the same everywhere and all atoms of the same element are also the same.
Suppose you make contact with an alien race who want to share their scientific knowledge with you.
They have elements too, but they classify them by the number of neutrally charged particles.
They present you with their element, "Gacainium", which has 117 neutrally charged particles.
Taking a sample back to the lab, you find that the mass number of the element Gacainium to be 195.

What is the Earth equivalent of this element the aliens have presented to you?

please helpp ! own words

Question

All elements are the same everywhere and all atoms of the same element are also the same. 
Suppose you make contact with an alien race who want to share their scientific knowledge with you.
They have elements too, but they classify them by the number of neutrally charged particles.
They present you with their element, "Gacainium", which has 117 neutrally charged particles. 
Taking a sample back to the lab, you find that the mass number of the element Gacainium to be 195. 

What is the Earth equivalent of this element the aliens have presented to you?
 
please helpp ! own words

anonymous · Answer

Unuseptium has 117 neutrons. Unuseptium weight wasnt discover untill 2010. so maybe this is an old question?

jfraser · Answer

117 NEUTRAL particles doesn't mean atom 117. Use the mass number of 195 to find the number of protons.

anonymous · Answer

huh?

jfraser · Answer

if the element has 117 neutral particles, it can't be element 117, because we define atomic number by POSITIVE particles, not neutral ones. The mass number is 195, and 117 come from the neutral particles. The rest must come from the positive particles.