Question 1.) match the parent nuclei with the daughter nuclei. these are the parent nuclei 1. 234 91 protactinium plus 0 negative 1 electron 2. 234 90 thorium plus 4 2 helium 3. 222 86 radon plus 4 2 helium 4. 7 4 beryllium plus 0 negative 1 electron these are the daughter nuclei a. uranium238 b. thorium234 c. lithium7 d. radium226 question 2.) match the elements with the number of neutrons. (4 points) these are the elements 1. 88 38 strontium 2. 14 6 carbon 3. 127 53 iodine 4. 39 19 potassium these are the number of neutrons a. 20 b. 50 c. 8 d. 74

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

(1. The options 1,2,3 and 4 are matched by the b,c, a,d respectively.

(2.) The options 1,2,3 and 4 are matched by the b,c,d, a respectively.

What is the atomic number?

A chemical element's atomic number, also known as its proton number, is the number of protons contained in the nucleus of each atom of that element.

A chemical element is identified by its atomic number. It is the same as the nucleus' charge number.

(1) options 1,2,3 and 4 are matched by the b,c, a,d respectively.

When we add an electron it causes no effect on the mass number but due to which atomic number is reduced by 1.

1.   ₉₁Protactinium²³⁴ +1e⁻ is matched with Thorium²³⁴

2.   ₉₀Thorium²³⁴ + ₄₂Helium is matched with Lithium

3.   ₈₆Radon²²² + ₂Helium⁴ is matched with  Uranium²³⁸

4.   ₄Beryllium⁷ + 1⁻e is matched with Radium²²⁶

Hence options 1,2,3 and 4 are matched by the b,c, a,d respectively.

(2.)The options 1,2,3 and 4 are matched by the b,c,d, a respectively.

As we know that the mass number is equal to the sum of protons and neutrons.

1. ₃₈Strontium⁸⁸  

atomic number = 38

mass number = 88

neutrons = mass number - atomic number

neutrons =88-38 =50

2. ₆Carbon¹⁴

atomic number = 6

mass number = 14

neutrons = mass number - atomic number

neutrons =14-6 =8

3.  ₅₃Iodine¹²⁷

atomic number = 53

mass number = 127

neutrons = mass number - atomic number

neutrons =127-53= 74

4. ₁₉Potassium³⁹

atomic number = 19

mass number = 39

neutrons = mass number - atomic number

neutrons =39-19= 20

a. ₃₈Strontium⁸⁸ ⇒ 50

b. ₆Carbon¹⁴ ⇒  8

c. ₅₃Iodine¹²⁷  ⇒ 74

d.  ₁₉Potassium³⁹⇒  20

Hence options 1,2,3 and 4 are matched by the b,c,d, a respectively.

To learn more about the atomic number refer to thr link;

link

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

An example of environmentally learned behavior is aggressive behavior, i grew up seeing many aggressive people in my life and a slowly started picking up those traits however i was able to call myself out and not give in to those traits.