Answer:
146
Explanation:
uranium is 92 and the mass number of the isotope is given as a 238 therefore it is not the two protons 92 electrons and
real explanation Google it
Chemistry affects all aspects of life and most natural events because all living and nonliving things are made of matter.
An educated guess is called estimation
Explanation:
Density of object = gram/volume
= 100 g/ 5 cm³
= 20 g/cm³
