Question

i want 15 MCQS of
shielding effect
atomic size
ionization energy

Answer 1

Answer:

Sorry to Find 15 MCQs Questions it will take a lot of time so please find it out from Google.

Explanation:

• Shielding effect

1. Which of the following elements has greater shielding effect?

(A) Li

(B) Na

(C) K

(D) Rb

• Atomic size

2. Which of the following atoms has the largest atomic radius?

Possible Answers:

1. P
2. Se
3. As
4. S

• Ionization energy

3. The ionization energy of an element is -

A) The same as the electron affinity of the element

B) Equal in magnitude but of opposite sign to the electron affinity of the element

C) The energy released when an electron is added to an atom of the element

D) The energy required to remove the outermost electron of an atom of the element

Answer 2

ANSWER EXPLANATION: There are two ways to solve this question. The faster way is to multiply each side of the given equation by ax−2 (so you can get rid of the fraction). When you multiply each side by ax−2, you should have:

24x2+25x−47=(−8x−3)(ax−2)−53

You should then multiply (−8x−3) and (ax−2) using FOIL.

24x2+25x−47=−8ax2−3ax+16x+6−53

Then, reduce on the right side of the equation

24x2+25x−47=−8ax2−3ax+16x−47

Since the coefficients of the x2-term have to be equal on both sides of the equation, −8a=24, or a=−3.

The other option which is longer and more tedious is to attempt to plug in all of the answer choices for a and see which answer choice makes both sides of the equation equal. Again, this is the longer option, and