197
When 195Au undergoes electron capture, a proton in the nucleus is converted into a neutron. This results in the production of 195Pt as the daughter nucleus.
Thallium (Tl) has one more proton then mercury (Hg), mercury has 79 protons, Thallium has 80 protons.
Use your periodic table of elements. The number to the top left of each atom (its 'atomic number') is also the number of protons in the atom's nucleus. In the case of gold (Au), that number is 79.
The proton number is the atomic number.
195 0/any number
There are eight divisors of the number 195.
The element and precious metal of gold has the symbol Au. Au has an atomic (proton#) of 79 and a weight of 197.0 grams per mole.
When a mercury-202 nucleus is bombarded with a neutron and a proton is ejected, the resulting nucleus will have one less proton than the original mercury nucleus. Mercury (Hg) has an atomic number of 80, so after losing a proton, the new element formed will be gold (Au), which has an atomic number of 79. Thus, the reaction transforms mercury-202 into gold-201.
atomic number = number of proton in an element number of proton = number of electron mass number = number of proton + number of neutron therefore... atomic number = mass number - number of neutrons
195 is a not perfect square.
3 and 5 are divisable by 195
195 is what it would be.