2 Points Gold-185 decays by alpha decay. Part of the nuclear equation is shown below.
Fill in the blank with a number.
1959 A. → He +71r
Answer here

Find the attached file for the answer.

Explanation:

When an element decays with alpha particles, the alpha particles involved is helium 4 elements.

When a Gold-185 decays by alpha decay, it will decay to form iridium 181

The Atomic number of gold is 79 and the atomic number of helium is 2

To balance the nuclear reaction,

The Atomic number of iridium will be:

79 = x + 2

X = 79 - 2 = 77

The mass number of gold is 185 and the helium mass number is 4

The mass number of iridium is:

185 = M + 4

M = 185 - 4 = 181

Find the attached file for the remaining solution.

i guess it’s a and b

conduction, convection, radiation