Chemistry, 14.10.2019 00:00 wcraig1998

Which radioisotope has an atom that emits a particle with a mass number of 0 and a charge of +1?
(1) 3h (3) 19ne
(2) 16n (4) 239pu

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Answer from: gunnatvinson

The correct answer is option 3.

Explanation: There are three types of particles that are emitted when a radioisotope undergo decay process:

1. Alpha particle: This particle is emitted when a radioisotope undergoes alpha decay process. The charge on the particle is +2 and mass number is 4.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha$

2. Beta-particle: This particle is emitted when a radioisotope undergoes beta-minus decay process. The charge on the particle is -1 and mass number is 0.

$_Z^A\textrm{X}\rightarrow _{Z+1}^{A}\textrm{Y}+_{-1}^0\beta$

3. Positron particle: This particle is emitted when a radioisotope undergoes beta-plus decay process. The charge on the particle is +1 and mass number is 0.

$_Z^A\textrm{X}\rightarrow _{Z-1}^{A}\textrm{Y}+_{+1}^0\beta$

For the given options undergoing decay processes:

Option 1:

$_1^3\textrm{H}\rightarrow _{2}^{3}\textrm{He}+_{-1}^0\beta$

It emits beta-particle.

Option 2:

$_7^{16}\textrm{N}\rightarrow _{8}^{16}\textrm{O}+_{-1}^0\beta$

It emits beta-particle.

Option 3:

$_{10}^{19}\textrm{Ne}\rightarrow _{9}^{19}\textrm{F}+_{+1}^0\beta$

It emits positron-particle.

Option 4:

$_{94}^{239}\textrm{Pu}\rightarrow _{92}^{235}\textrm{U}+_2^4\alpha$

It emits alpha particle.

Hence, the correct option is Option 3.

Answer from: Quest

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

Answer from: Quest

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

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Which radioisotope has an atom that emits a particle with a mass number of 0 and a charge of +1?

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