Answer:
76
Explanation:
Alpha decay is one of the most basic forms of radioactive decay. It has an atomic mass of 4 and a proton number of two.
Undergoing an alpha decay will decrease the atomic mass by four and the atomic number by two.
In this particular question, we are particular about the atomic number. The atom has an atomic number of 78. So taking 2 off this gives 76
The atomic number of pt-175 after it undergoes alpha decay is 76
Radioactive decay is defined as the splitting of heavy unstable isotopes to two or more stable particles. The three main types of radioactive decay are
An Alpha decay occurs when the radioactive nucleus releases a helium ion (alpha particle) leaving the daughter nucleus with a reduced atomic number by 2 and reduced atomic mass by 4.
An example is the alpha decay below
¹⁷⁵Pt₇₈ ----> ¹⁷¹ Os₇₆ + ⁴ He₂
Here,Platinum 175 with atomic number 78 undergoes alpha decay to produce Osmium 171 with atomic number 76.
See related answer here:https://brainly.com/question/5876246
