CHM1045 Plicker Questions for Exam Review
Use these Plicker Questions from class to study for any upcoming exams - including the Final Exam
1. What element has mass number (A) of 48 and 22 protons?
A K
B Ca
C Sc
D Ti
2. What element(s) tend to form +2 ions?
A Halogens
B Transition metals
C Alkali metals
D Alkaline metals
3. Chromium (Atomic weight 51.996) has four naturally-occurring isotopes. Three of these are 50-Cr with isotopic weight 49.9461 (abundance 4.31%), 52-Cr with isotopic weight 51.9405 (abundance 83.76%) and 54-Cr with isotopic weight 53.9389 (abundance 2.38%) Which of the following isotopic weights is the most likely for the fourth isotope?
A 50.9321
B 52.9237
C 54.9381
D 48.8211
4. Nitroglycerin is C3H5N3O9. What is the molecular weight of nitroglycerin?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 227.10
B 240.22
C 256.20
D 270.42
5. What is the formula for a compound containing calcium (Ca) and nitrogen (N) ?
A Ca2N3
B CaN
C NCa
D Ca3N2
6. What charge is on iron in the compound Fe2O3?
A +1
B +2
C +3
D -2
7. Silicon (Atomic weight 28.0855) has three naturally-occurring isotopes. Two of these are 28-Si with isotopic weight 27.97693 (abundance 92.21%) and 30-Si with isotopic weight 29.97376 (abundance 3.09%) Which of the following isotopic weights is the most likely for the third isotope?
A 25.9872
B 30.9738
C 31.9267
D 28.9741
8. Phenobarbital is C12H12N2O3. What is the molecular weight of phenobarbital?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 286.44
B 232.24
C 220.42
D 270.42
9. Indium (Atomic weight 114.82) has two naturally-occurring isotopes, the predominant one being 115-In with isotopic weight 114.9041 and an abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope?
A 112.94
B 113.90
C 114.90
D 115.90
10. A cation has a positive charge because:
A it has a positively charged nucleus
B there are more protons than neutrons
C there are fewer electrons than protons
D there are more electrons than protons
1. What element has mass number (A) of 48 and 22 protons?
A K
B Ca
C Sc
D Ti
2. What element(s) tend to form +2 ions?
A Halogens
B Transition metals
C Alkali metals
D Alkaline metals
3. Chromium (Atomic weight 51.996) has four naturally-occurring isotopes. Three of these are 50-Cr with isotopic weight 49.9461 (abundance 4.31%), 52-Cr with isotopic weight 51.9405 (abundance 83.76%) and 54-Cr with isotopic weight 53.9389 (abundance 2.38%) Which of the following isotopic weights is the most likely for the fourth isotope?
A 50.9321
B 52.9237
C 54.9381
D 48.8211
4. Nitroglycerin is C3H5N3O9. What is the molecular weight of nitroglycerin?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 227.10
B 240.22
C 256.20
D 270.42
5. What is the formula for a compound containing calcium (Ca) and nitrogen (N) ?
A Ca2N3
B CaN
C NCa
D Ca3N2
6. What charge is on iron in the compound Fe2O3?
A +1
B +2
C +3
D -2
7. Silicon (Atomic weight 28.0855) has three naturally-occurring isotopes. Two of these are 28-Si with isotopic weight 27.97693 (abundance 92.21%) and 30-Si with isotopic weight 29.97376 (abundance 3.09%) Which of the following isotopic weights is the most likely for the third isotope?
A 25.9872
B 30.9738
C 31.9267
D 28.9741
8. Phenobarbital is C12H12N2O3. What is the molecular weight of phenobarbital?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 286.44
B 232.24
C 220.42
D 270.42
9. Indium (Atomic weight 114.82) has two naturally-occurring isotopes, the predominant one being 115-In with isotopic weight 114.9041 and an abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope?
A 112.94
B 113.90
C 114.90
D 115.90
10. A cation has a positive charge because:
A it has a positively charged nucleus
B there are more protons than neutrons
C there are fewer electrons than protons
D there are more electrons than protons
CHM1045 Plicker Questions for Exam Review - Answers
1. What element has mass number (A) of 48 and 22 protons?
D Ti
2. What element(s) tend to form +2 ions?
D Alkaline metals
3. Chromium (Atomic weight 51.996) has four naturally-occurring isotopes. Three of these are 50-Cr with isotopic weight 49.9461 (abundance 4.31%), 52-Cr with isotopic weight 51.9405 (abundance 83.76%) and 54-Cr with isotopic weight 53.9389 (abundance 2.38%) Which of the following isotopic weights is the most likely for the fourth isotope?
B 52.9237
4. Nitroglycerin is C3H5N3O9. What is the molecular weight of nitroglycerin?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 227.10
5. What is the formula for a compound containing calcium (Ca) and nitrogen (N) ?
D Ca3N2
6. What charge is on iron in the compound Fe2O3?
C +3
7. Silicon (Atomic weight 28.0855) has three naturally-occurring isotopes. Two of these are 28-Si with isotopic weight 27.97693 (abundance 92.21%) and 30-Si with isotopic weight 29.97376 (abundance 3.09%) Which of the following isotopic weights is the most likely for the third isotope?
D 28.9741
8. Phenobarbital is C12H12N2O3. What is the molecular weight of phenobarbital?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
B 232.24
9. Indium (Atomic weight 114.82) has two naturally-occurring isotopes, the predominant one being 115-In with isotopic weight 114.9041 and an abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope?
A 112.94
10. A cation has a positive charge because:
C there are fewer electrons than protons
D Ti
2. What element(s) tend to form +2 ions?
D Alkaline metals
3. Chromium (Atomic weight 51.996) has four naturally-occurring isotopes. Three of these are 50-Cr with isotopic weight 49.9461 (abundance 4.31%), 52-Cr with isotopic weight 51.9405 (abundance 83.76%) and 54-Cr with isotopic weight 53.9389 (abundance 2.38%) Which of the following isotopic weights is the most likely for the fourth isotope?
B 52.9237
4. Nitroglycerin is C3H5N3O9. What is the molecular weight of nitroglycerin?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
A 227.10
5. What is the formula for a compound containing calcium (Ca) and nitrogen (N) ?
D Ca3N2
6. What charge is on iron in the compound Fe2O3?
C +3
7. Silicon (Atomic weight 28.0855) has three naturally-occurring isotopes. Two of these are 28-Si with isotopic weight 27.97693 (abundance 92.21%) and 30-Si with isotopic weight 29.97376 (abundance 3.09%) Which of the following isotopic weights is the most likely for the third isotope?
D 28.9741
8. Phenobarbital is C12H12N2O3. What is the molecular weight of phenobarbital?
(Atomic weights: C = 12.01, O = 16.00, N = 14.01, H = 1.008).
B 232.24
9. Indium (Atomic weight 114.82) has two naturally-occurring isotopes, the predominant one being 115-In with isotopic weight 114.9041 and an abundance of 95.72%. Which of the following isotopic weights is the most likely for the other isotope?
A 112.94
10. A cation has a positive charge because:
C there are fewer electrons than protons