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4 years ago

A beta particle is a fast moving electron that is emitted when a neutron in an unstable nucleus converts into a proton.

Chemistry

1 answer:

sasho [114]4 years ago

6 0

Answer:

True

Explanation:

Beta radiations:

Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.

Properties of Beta radiations:

The mass of beta particle is smaller than the alpha particles.

They can travel in air in few meter distance.

These radiations can penetrate into the human skin.

The sheet of aluminium is used to block the beta radiation

⁴₆C → ¹⁴₇N + ⁰₋₁e

The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.

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The number of electrons in an element x is 15 and the number of neutrons is 16. Which of the following is the correct representa

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Answer:

Explanation:

A is the correct representation because mass number is 15+16=31 and atomic number is 15 which is equal to number of electrons so its 31X15

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3 years ago

A balance is used to measure mass

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4 years ago

Read 2 more answers

A block of aluminium occupies a volume of 11.1 mL and weighs 43 g. What is it's density? Give answer with one decimal.

horrorfan [7]

Answer:

<h2>Density = 3.9 g/ mL</h2>

Explanation:

The density of a substance can be found by using the formula

$Density = \frac{mass}{volume}$

From the question

mass = 43 g

volume = 11.1 mL

Substitute the values into the above formula and solve for the density

That's

$Density = \frac{43}{11.1} \\ = 3.873873...$

We have the final answer as

Density = 3.9 g/ mL to one decimal place

Hope this helps you

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