Question

When the mass of the radioactive substance is decreases the mean life of the sample

Answer 1

In 1896, A.H. Becquerel accidentally discovered radioactivity. He was studying the fluorescence and phosphorescence of compounds irradiated with visible light. This is when he observed something interesting. Let’s learn more about the law of radioactive decay in the section below.

There are three types of radioactive decays in nature:

α-decay –a helium nucleus (42He) is emittedβ-decay – where electrons or positrons (particles with the same mass as electrons, but with a charge exactly opposite to that of an electron) are emitted;γ-decay – high energy (hundreds of keV or more) photons are emitted.

Answer 2

Answer:

A.H. Becquerel inadvertently discovered radioactivity in 1896. He was researching the fluorescence and phosphorescence of compounds that had been exposed to visible light. This was when he noticed something intriguing. In the following section, we will learn more about the law of radioactive decay.

Explanation:

In nature, there are three types of radioactive decays:

α-decay –a helium nucleus (42He) is emittedβ-decay – where electrons or positrons (particles with the same mass as electrons, but with a charge exactly opposite to that of an electron) is emitted;γ-decay – high energy (hundreds of keV or more) photons are emitted.

Learn More:-

Radioactive Substance:-

1. https://brainly.in/question/5007488

2. https://brainly.in/question/4583898

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