Chemistry 51 - Fundamentals of Chemistry » Fall 2021 » Chapter 2 and 3 Additional Questions

Need help with your exam preparation?

Existing Quiz Clients Login here
Question #1
An unknown atom has the following subatomic particles: 61 electrons, 60 neutrons, and 60 protons. What is the charge of this atom?
A.   1
B.   2
C.   -1
D.   -2
Question #2
An unknown atom has the following subatomic particles: 132 electrons, 141 neutrons, and 131 protons. What is the mass number of this atom?
A.   212
B.   200
C.   222
D.   272
Question #3
An atom of platinum (Pt) has a mass number of 195. How many neutrons does this atom have?
A.   100
B.   170
C.   110
D.   117
Question #4
A new element is discovered and named Newelementium (Nw). This new element is known to have two naturally occurring isotopes. The atomic masses of the two isotopes are measured to be: 320.301 amu (Nw-320) and 335.265 amu (Nw-335). If the natural abundance of Nw-320 is 16.14%, what is the atomic mass of this new element? Round your final answer to two decimal places.
A.   347.15
B.   300.85
C.   332.85
D.   313.25
Question #5
An atom of nitrogen that has a charge of -2 has how many valence electrons?
A.   5
B.   2
C.   7
D.   4
Question #6
An atom of sulfur (S) has a charge of 2. How many electrons are in its 3p orbital?
A.   2
B.   5
C.   3
D.   4
Question #7
An atom of antimony (Sb) has a valence shell of "5s2 4d10 5p6". How many total electrons does this atom have?
A.   40
B.   50
C.   54
D.   48

Need help with your exam preparation?

Existing Quiz Clients Login here