Question 1

Which of the following orbitals has a spherical shape?

Accepted Answer

A) 4s 
B) 4px 
C) 4dxy 
D) all of the above 
E) none of the above

Question 2

Which element has the following electron configuration: 1S₂ 2S₂ 2p6 3S₂ 3p6 4s1?

Accepted Answer

A) Al 
B) Ca 
C) K 
D) Na 
E) none of the above

Question 3

Which of the following of Dalton's proposals is still valid?

Accepted Answer

A) An element is composed of tiny particles called atoms. 
B) Atoms of different elements combine to form compounds. 
C) Compounds contain atoms in small whole number ratios. 
D) all of the above 
E) none of the above

Question 4

What is the term for the region of very high density in the center of the atom?

Accepted Answer

A) atomic center 
B) atomic core 
C) atomic kernel 
D) atomic nucleus 
E) none of the above

Question 5

How many neutrons are in the nucleus of an atom of  O?

Accepted Answer

A) 8 
B) 10 
C) 18 
D) 26 
E) none of the above

Question 6

Which of the following colors of light has the highest frequency?

Accepted Answer

A) violet 
B) green 
C) yellow 
D) red 
E) All colors have the same frequency.

Question 7

Which of the following types of radiation has the highest energy?

Accepted Answer

A) X rays 
B) ultraviolet 
C) visible 
D) infrared 
E) All radiation has the same energy.

Question 8

According to the Thomson model,what is the relative charge on an electron?

Accepted Answer

A) -1 
B) +1 
C) -2 
D) +2 
E) none of the above

Question 9

What is the term for a particle of radiant energy?

Accepted Answer

A) electron 
B) neutron 
C) photon 
D) proton 
E) none of the above

Question 10

Element Y has two natural isotopes: Y-63 (62.940 amu)and Y-65 (64.928 amu).Calculate the atomic mass of element Y given the abundance of Y-63 is 69.17%.

Accepted Answer

A) 63.55 amu 
B) 64.00 amu 
C) 64.32 amu 
D) 107.85 amu 
E) 108.46 amu

Question 11

Which of the following was responsible for Dalton's scientific success?

Accepted Answer

A) Dalton inherited great family wealth. 
B) Dalton taught at a prestigious university. 
C) Dalton had an excellent scientific education. 
D) Dalton had meticulous work habits. 
E) Dalton had political influence.

Question 12

How many energy sublevels theoretically exist in the 5th energy level?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) none of the above

Question 13

Which of the following represents the quantum nature of matter?

Accepted Answer

A) atom 
B) electron 
C) neutron 
D) photon 
E) proton

Question 14

Which of the following colors of light has the longest wavelength?

Accepted Answer

A) violet 
B) blue 
C) orange 
D) red 
E) All colors have the same wavelength.

Question 15

How many photons of light are emitted when the electrons in 10 hydrogen atoms drop from energy level 5 to 3?

Accepted Answer

A) 1 
B) 10 
C) 30 
D) 50 
E) none of the above

Question 16

What is the maximum number of electrons in a 4d orbital?

Accepted Answer

A) 1 
B) 2 
C) 5 
D) 10 
E) none of the above

Question 17

Which of the following gaseous elements produces blue light in an advertising display?

Accepted Answer

A) helium 
B) hydrogen 
C) mercury 
D) neon 
E) all of the above

Question 18

Which electron sublevel follows the 5s sublevel according to increasing energy?

Accepted Answer

A) 4p 
B) 4d 
C) 5p 
D) 5d 
E) 6s

Question 19

Which of the following gaseous elements produces pink light in an advertising display?

Accepted Answer