QUESTION 1 Of the quantum numbers n, l , m l , and m s , which is the spin quant

Question

QUESTION 1

Of the quantum numbers n, l, ml, and ms, which is the spin quantum number?

ml

n

l

ms

1 points   

QUESTION 2

Valence electrons are the outer electrons of an atom.

True

False

1 points   

QUESTION 3

What type of bond is between the two carbon atoms in the molecule ethane (C2H6)?

Double

Single

Triple

1 points   

QUESTION 4

A molecule has a carbon atom that is best described by sp3 hybridization. Which bond angles (in degrees) come closest to describing the carbon?

180

109.5

120

1 points   

QUESTION 5

Atoms that obey the octet rule have how many valence electrons?

Eighteen

Eight

Six

Three

1 points   

QUESTION 6

A molecule has a carbon atom that is best described by sp hybridization. How many other atoms are connected to this carbon?

Four

Three

Two

One

1 points   

QUESTION 7

The electron configuration, 1s22s22p6 is correct for which of the following atoms.

Li

Ne

Ar

O

1 points   

QUESTION 8

Choose the answer that best completes the sentence: In molecular orbital theory, a single bond consists of ______.

a pi molecular orbital

one sigma and two pi molecular orbitals

one sigma and one pi molecular orbital

a sigma molecular orbital

1 points   

QUESTION 9

The compound N2 contains only this kind of bond.

triple

single

double

1 points   

QUESTION 10

What is the maximum number of electrons that can be contained in the 4s orbitals?

10

2

6

14

ml

n

l

ms

Explanation / Answer

Question 1 ) the spin quantum number is represented by ms

n = principle quantum number

l = azimuthal quantum number

ml = magnetic quantum number

2) true: valence electrons are the electrons present in the outer most shell of an atom

For example

sodium : 1s2 2s2 2p6 3s1

So here the outer most shell is n= 3

the valence electrons are= 01

3) ethane (C2H6) is a saturated compound and consists of only sigma bonds , there is no pi bond

Hence single bond is present

4) the bond angle for tetrahedral arrangement is : 109.5 (sp3)

the bond angle 180 is for linear arrangement (sp)

120 is for trigonal planar (sp2)

5) the atoms which obey octet (8) rule have 8 electrons in their outermost shell

example : argon : 1s2, 2s2 2p6

6) sp hybridisation means that the carbon is triple bonded with one carbon

the total valency of carbon = 4

so if it is making three bond with other carbon then there is only one other atom attached to it

So total atoms= 2

7)The electron configuration, 1s22s22p6

Total number of electrons = 10

the neutral element with 10 electrons will be argon (Ar)

8) In molecular orbital theory, a single bond consists of : only sigma bond

sigma molecular orbital

9) compound N2 is formed from two nitrogen atoms which have triple bond (1 sigma bond and 2 pi bond)

10) the maximum electrons in any s orbitals = 2

so for 4s also it is = 2

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