Question

1) Based upon the information provided in the class, which of the following bond types is the strongest? Question options:

A) hydrogen bond

B) Ion - Dipole

C) Dipole - Dipole

D) Ion - Induced Dipole

E) Dipole - Induced Dipole

2)

Which radioactive emission has the smallest (least) mass?

Question options:

	A) Positron
	B) Alpha
	C) All have equal mass
	D) Gamma
	E) Beta

3)

An unstable isotope that naturally decays CAN emit which of the following? Choose all correct responses, there are at least two. {Hint: probably are more than two}

Question options:

	A) Alpha particle
	B) Beta particle
	c) Radiation
	D) Positron
	E) Gamma rays
	F) Visible light

Answer 1

Answers for question number 1

B) Ion-dipole

Explanation is given below

Let us first understand the meaning of this terms

1) Dipole-dipole = Dipole means when two opposite charges are separated by small finite distance. The attractive interaction between these dipoles is known as dipole-dipole interactions.

       Dipole-dipole interactions are weaker than ion-dipole interactions and they fall off more rapidly with distance (1/r³).

2) Hydrogen bond- The attractive interaction between most electronegative atom of one molecule and hydrogen atom of other molecule is called as Hydrogen bonding. Hydrogen bonding is nothing but type of dipole-dipole interactions.

H-F------H-F------H-F----

3) Ion-dipole interaction- It is the attractive interactions between cation or anion with dipole.Ion-dipole interactions are stronger and they exists in the distance of (1/r)

4) Ion-induced dipole - The force of attraction between ion and temporary dipole(induced dipole) is called as ion-induced dipole interactions. It is very short range force which exists upto distance of 1/r⁴.

5) Dipole-induced dipole - It is again very weaker force of attraction and exists upto the distance of 1/r⁶.

Hence order of decreasing force of attraction is

Ion-dipole> Hydrogen bond> Dipole-dipole>Ion-induced dipole>Dipole-induced dipole.

Answer for question 2 is A)Positron

Positron is radioactive emission having mass zero( ⁰₊₁e )

alpha particle (He nuclei) has mass of 4

gamma rays is no mass and no charge but they are called as electromagnetic radiations but we are asked to find radioactive emissions hence this cannot be the answer.

Answer for question 3 is

A)alpha particle

B) Beta particle

C) Gamma rays

Explanation:

Positron emission is artificial emission. visible light cannot be the answer.