The glass hand bubbler holds a red liquid. When it heats up, do you see a chemical change or a physical change? How do you know?

Chemical change

Explanation:

Bubbles are usually a sign of a chemical reaction in the form of a gas so I would say this is a chemical change

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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they are made of gases.

they have a spherical shape.

they make energy through fusion.