Chem exam 4

Give all possible orbitals for n = 4.

4s, 4p, 4d, 4f

How many different values of ml are possible in the 3d sublevel?

5

In the Lewis structure of CH3OH, how many bonding pairs of electrons are there?

5

How many orbitals are contained in the third principal level (n=3) of a given atom?

9

Give the value of l for a 3p sublevel.

1

How many different values of l are possible in the third principal level?

3

How many of the following elements have 1 unpaired electron in the ground state? B Al Se Br

3

Identify the most electronegative element

F

When filling degenerate orbitals, electrons fill them singly at first, with parallel spins. This is know as

Hunds rule

Because of the baseball's ______ mass, its de Broglie wavelength is very ______ and _______ compared to the size of the baseball itself, and therefore its effects are not observable.

Large, small, insignificant

Which of the following transitions (in a hydrogen atom) represent emission of the longest wavelength photon? n = 3 to n = 4 n = 4 to n = 2 n = 5 to n = 4 n = 3 to n = 1 n = 1 to n = 2

N=5 to N=4

Which molecule or compound below contains an ionic bond?

NH4NO3

No two electrons can have the same four quantum number is known as

Pauli exclusion principle

X-rays pass through many substances that block visible light and are therefore used to image bones and internal organs. Which of the following is a correct statement about X-rays?

X-rays have shorter wavelength than visible light

Which of the following transitions represent the emission of a photon with the largest energy? n = 6 to n = 3 n = 1 to n = 4 n = 2 to n = 1 n = 3 to n = 1 n = 2 to n = 5

n=3 to n=1

What are the possible orbitals for n = 3?

s, p, d

Give the numbers for ml for a d orbital.

-2, -1, 0, 1, 2

For n = 4, what are the possible sublevels?

0,1,2,3

Give the principal level for a 2 p sublevel

2

How many sublevels are contained in the second shell (n=2) of a given atom?

2

How many unpaired electrons are present in the ground state Ge atom?

2

In the Lewis structure of CH3OH, how many lone pairs of electrons are there?

2

What value of l is represented by a d orbital?

2

A covalent bond has a lower potential energy than the

2 seperate atoms

Which molecule or compound below contains a pure covalent bond?

Cl2

Place the following elements in order of increasing electronegativity. K Cs P

Cs < K < P

Place the following types of electromagnetic radiation in order of increasing wavelength. ultraviolet light gamma rays radio waves

gamma rays < ultraviolet light < radio waves

Give the set of four quantum numbers that could represent the last electron added (using the Aufbau principle) to the Cl atom

n = 3, l = 1, ml = 1, ms = +½