What happens during an alpha decay?

Chemistry

1 answer:

Andrej [43]4 years ago

6 0

Answer:

Alpha decay is a type of radioactive disintegration in which unstable atomic nucleus releases a helium nucleus or alpha particle and transform into a different element. The new element formed will be reduced by four and the atomic number will be reduced by two.

Example of alpha decay is: Uranium 238 transform into Thorium 234 with the emission of an alpha particle.

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An object with a pre-weighed mass of exactly (and correctly) 0.54 g is given to 2 students. One student obtains a weight of 0.59

Alina [70]

Answer:

Both student have same percent error.

Explanation:

Given data:

Actual mass of object = 0.54 g

Measured value by one student = 0.59 g

Measured value by second student = 0.49 g

Percent error = ?

Solution:

Formula

Percent error = (measured value - actual value / actual value) × 100

Percent error of first student:

percent error = (0.59 g - 0.54 / 0.54 ) ×100

percent error = 9.3 %

Percent error of second student:

Percent error = (0.49 g - 0.54 / 0.54 ) ×100

Percent error = - 9.3 %

Both student have same percent error. The only difference is that first student measure the greater value then actual value and second student measure the less value then actual, however difference was same and gives same percent error.

3 0

4 years ago

Which element is classified as a noble gas?<br> O<br> N<br> Cl<br> Xe

ivann1987 [24]

<u>Answer:</u> The correct answer is Xenon (Xe).

<u>Explanation:</u>

Noble gases are defined as the gases which have fully filled electronic configuration or stable electronic configuration.

From the given options:

<u>Option 1:</u> Oxygen (O)

The atomic number of this element is 8.

Electronic configuration of this element: $1s^22^22p^4$