Which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help Human activities such as the combustion of fossil fuels, has increased the levels of greenhouse At dew point, the water vapor begins to condense out of air. gases. Human activities, such as the combustion of fossil fuels, generate the aerosols. You observe hail when the temperatures are below the freezing point. Carbon dioxide is produced during respiration of plants, animals, fungi, and microorganisms. Chemical reaction Physical change

1) Human activities such as the combustion of fossil fuels, has increased the levels of greenhouse gases  Chemical reaction.

2) At dew point, the water vapor begins to condense out of air  Physical changes.

3)  Human activities, such as the combustion of fossil fuels, generate the aerosols  Chemical reaction.

4) You observe hail when the temperatures are below the freezing point  Physical changes.

5) Carbon dioxide is produced during respiration of plants, animals, fungi, and microorganisms  Chemical changes.

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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