Chemistry Regents Prep #1
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- 1.
- A.
The same charge and a smaller mass.
- B.
The same charge and the same mass.
- C.
An opposite charge and a smaller mass.
- D.
An opposite charge and the same mass.
- 2.
- A.
Deuterons
- B.
Neutrons
- C.
Protons
- D.
Unoccupied space
- 3.
- A.
A neutron.
- B.
An alpha particle.
- C.
A beta particle.
- D.
An electron.
- 4.
- A.
2-7-19-9-2
- B.
2-8-18-9-2
- C.
2-7-17-8-3
- D.
2-8-18-7-4
- E.
2-8-18-6-6
- 5.
- A.
C-14 and N-14
- B.
O-16 and O-18
- C.
Rn-222 and Ra-222
- D.
I-131 and I-131
- 6.Which atom contains exactly 15 protons?
- A.
P-32
- B.
S-32
- C.
O-15
- D.
N-15
- 7.An ion with 5 protons, 6 neutrons, and a charge of 3+ has an atomic number of...
- A.
5
- B.
6
- C.
8
- D.
11
- 8.What is the mass number of an atom which contains 28 protons, 28 electrons, and 34 neutrons?
- A.
6
- B.
28
- C.
34
- D.
62
- E.
90
- 9.
- A.
1, 2, and 13
- B.
2, 13, and 14
- C.
14, 15, and 16
- D.
16, 17, and 18
- 10.Which element has the highest first ionization energy?
- A.
Sodium
- B.
Aluminum
- C.
Calcium
- D.
Phosphorus
- 11.
- A.
Lose electrons and decrease in size.
- B.
Lose electrons and increase in size.
- C.
Gain electrons and decrease in size.
- D.
Gain electrons and increase in size.
- 12.
- A.
Bi
- B.
As
- C.
P
- D.
N
- 13.
- A.
Number of principal energy levels.
- B.
Number of valence electrons.
- C.
Atomic numbers.
- D.
Atomic masses.
- 14.At STP, which substance is the best conductor of electricity?
- A.
Nitrogen
- B.
Neon
- C.
Sulfur
- D.
Silver
- 15.
- A.
2
- B.
3
- C.
4
- D.
7
- E.
9
- 16.What is the empirical formula of the compound whose molecular formula is P4O10?(NOTE: Pv2O = P2O)
- A.
PO
- B.
POv2
- C.
Pv2Ov5
- D.
Pv8Ov20
- 17.
- A.
NO
- B.
Nv2O
- C.
NOv2
- D.
Nv2Ov3
- 18.What is the total number of atoms represented in the formula CuSO4 . 5H2O?
- A.
8
- B.
21
- C.
13
- D.
27
- 19.What is the gram formula mass of K2CO3?
- A.
106 g
- B.
67 g
- C.
99 g
- D.
138 g
- 20.
- A.
20%
- B.
30%
- C.
40%
- D.
50%
- E.
60%
- 21.What is the total number of moles of hydrogen gas contained in 9.03 x 1023?
- A.
1.50 moles
- B.
2.00 moles
- C.
6.02 moles
- D.
9.03 moles
- 22.
- A.
CaO
- B.
CO
- C.
Al2O3
- D.
Li2O
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