CHM204: Structure And Bonding TMA2

Question 1 : The effect of increasing strong attraction of the electrons to the nucleus makes the electrons _______.
A. Become closer to the nucleus and more tightly bound to it
B. Weak, hence easily removed from the atom
C. Highly reactive
D. Mix up with the nucleus

Answer to question 1 is A. Become closer to the nucleus and more tightly bound to it

Question 2 : Why does the atomic size of an atom decrease across a period from left to right?
A. Because across a period atomic mass decreases
B. Because across a period atomic mass increases
C. Because across a period atomic number increases, the higher the atomic number the more strongly will the electrons be drawn toward the nucleus, and the smaller the atom
D. Because across a period atomic number decreases, the lesser the atomic number, the smaller the atom

Answer to question 2 is C. Because across a period atomic number increases, the higher the atomic number the more strongly will the electrons be drawn toward the nucleus, and the smaller the atom

Question 3 : In a Born -Haber cycle, the sequence of reactions occurs as ____________.
A. Gaseous atoms-element-gaseous ion-compounds-
B. Elements-gaseous atoms-gaseous ions-compound
C. Gaseous atom -gaseous ions-element-compound
D. Elements-gaseous ions-gaseous atoms-compound

Solve this question yourself

Question 4 : Aluminium oxide apart from dissolving in acids also dissolve in bases, it is therefore ________.
A. Neutral
B. Acidic
C. Basic
D. Amphoteric

Answer to question 4 is D. Amphoteric

Question 5 : Electrons of the outermost shell experience increasingly strong nuclear attraction because of ____________.
A. Addition of electrons one at a time moving from left to right across a period
B. Increasing atomic size across the period
C. Increasing atomic size down the group
D. Addition of electrons one at a time moving down the group

Answer to question 5 is A. Addition of electrons one at a time moving from left to across a period

Question 6 : _____ bond involves an overlap of the electron clouds from each atom .
A. Ionic bond
B. Covalent bond
C. Metallic bond
D. Intermolecular bond

Answer to question 6 is B. Covalent bond

Question 7 : __________ is not a member of Group 13 element.
A. Indium
B. Barium
C. Thallium
D. Aluminium

Answer to question 7 is B. Barium

Question 8 : All of the following are members of Group 14 elements except ______.
A. Germanium
B. Silicon
C. Tin
D. Barium

Answer to question 8 is D. Barium

Question 9 : The oxides of Group 13 dissolve in acids so, they may be considered ____________.
A. Basic
B. Acidic
C. Neutral
D. Amphoteric

Answer to question 9 is B. Acidic

Question 10 : Reactivities of the halogens declines as we _______________.
A. Go down the group
B. Go up the group
C. None of the above
D. A ll of the above

Answer to question 10 is A. down the group