An unstable isotope of ta-184 is a beta producer. what is the other product of the reaction?

Answer is: mass number stays 184, but atomic number changes.
Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.
There are two types of beta decay: beta minus and beta plus. In beta minus decay (atomic number Z is increased by one, new element is wolfram W) neutron is converted to a proton and an electron and an electron antineutrino.

In beta plus decay (atomic number Z is decreased by one, new element is hafnium Hf), a proton is converted to a neutron and positron and an electron neutrino, so mass number does not change.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

they are made of gases.

they have a spherical shape.

they make energy through fusion.