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exis [7]
3 years ago
5

What can you say about an atom with 4 protons, 2 neutrons, and 5 electrons?

Chemistry
1 answer:
iren2701 [21]3 years ago
5 0

Explanation:

This is a neutral beryllium atom

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An exothermic reaction has a positive enthalpy (heat) of reaction.(T/F)
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Answer:

True.

Explanation:

An exothermic reaction has a positive enthalpy (heat) of reaction. However, it can be negative in some circumstances.

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3 years ago
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Food undergoes both physical and chemical changes during digestion. Which parts of the digestive process listed below is a physi
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PET works by using a scanning device (a machine with a large hole at its center) to detect photons (subatomic particles) emitted by a radionuclide in the organ or tissue being examined.

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2 years ago
A cook places a pan of food on a hot stove and leaves it there. When the food is just about done cooking, which of the following
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C.

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Explanation:

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3 years ago
Which of the following examples illustrates a number that is correctly rounded to three significant figures?
Naily [24]

Answer:

c. 20.0332 g to 20,0 g

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A significant figure is each of the digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit, with the exception of the trailing zeros.

<em>Which of the following examples illustrates a number that is correctly rounded to three significant figures? </em>

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