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3 years ago

Question 1.) Match the parent nuclei with the daughter nuclei.

2 answers:

7 0

Question 1
Adding an electron has no effect on the mass number but it reduces the atomic number by 1.
So, 234 91 Protactinium plus 0 negative 1 electron results to Thorium234 and
7 4 Beryllium plus 0 negative 1 electron will result to Lithium7
Adding a Helium particle increases the mass number of the daughter nuclei by 4 and the atomic number by 2.
So, 234 90 Thorium plus 4 2 Helium will results to Uranium238 and
222 86 Radon plus 4 2 Helium will result to Radium226.

Question 2
The mass number is the sum of protons and neutrons. If an element has y protons and x neutrons, then its mass number will be (y+x).

88 38 Strontium. This element has a mass number of 88 and atomic number(number of protons) 38. Neutrons = 88 - 30 = 50.
Doing the same for the other elements we have;
14 6 Carbon ⇒ Neutrons = 14 - 6 = 8
 127 53 Iodine ⇒Neutrons = 127 - 53 = 74
4. 39 19 Potassium ⇒ Neutrons = 39 - 19 = 20

wlad13 [49]3 years ago

3 0

Give me some answer choices and i would be happy to help

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