Name three important discoveries of Physics, which have revolutionised modern chemistry.

Explanation

To answer the question about three important discoveries of physics that have revolutionized modern chemistry, we can break it down step by step:

### Step 1: Identify the first discovery
The first important discovery is the **study of radioactivity**. This discovery, made by scientists such as Henri Becquerel and Marie Curie, revealed that certain elements can emit radiation spontaneously. This understanding has had profound implications in chemistry, particularly in the fields of nuclear chemistry and the understanding of atomic structure.

### Step 2: Identify the second discovery
The second important discovery is the **study of isotopes using mass spectrographs**. This technique allows chemists to separate isotopes of elements based on their mass. The ability to identify and quantify isotopes has led to advancements in various fields, including nuclear medicine, radiocarbon dating, and understanding chemical reactions at a molecular level.

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