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victus00 [196]
3 years ago
7

One hot day, after adding fertilizer to the soil for her flowers, Joann notices that their petals change from pink to purple. In

trigued, she stops to smell her flowers to see if their scent has changed.
Which indicates a chemical change in the scenario?

energy change
formation of a gas
color change
release of an odor
Chemistry
1 answer:
lianna [129]3 years ago
8 0

Answer:

in this scenario a color change occured.

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The mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.

<h3>What is alpha decay?</h3>

Alpha decay of a radioactive material is the release of an alpha particle that posseses mass number of 4 and atomic number of 2.

According to this question, a certain radioactive atom that has 90 protons and 142 neutron undergoes alpha decay. This means that the mass number of the daughter atom will be as follows:

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Therefore, the mass number of the daughter atom formed from the alpha decay of a certain radioactive atom that has 90 protons and 142 neutrons is 228.

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