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geniusboy [140]
3 years ago
15

Which term describes a change that occurs with no new substances being formed?

Chemistry
1 answer:
Elina [12.6K]3 years ago
8 0

C. physical change

Explanation:

That's the answer

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At the beginning of an experiment, a scientist has 176 grams of radioactive goo. After 165 minutes, her sample has decayed to 5.
Paul [167]
The half-life equation is written as:

An = Aoe^-kt

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</span>
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3 years ago
What is the correct symbol of an ion containing 17 protons,20 neutrons and 18 electrons
Nataliya [291]

Answer:

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Explanation:

Let A be the symbol of the element.

Proton = 17

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From the question given,

The difference between the electron and proton = 18 — 17 = 1

So, the element has gain 1 electron.

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3 0
3 years ago
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