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1st Semester Exam Review Flashcards | StudBud
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1st Semester Exam Review
1st Semester Exam Review
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A review of everything learned in first semester (includes possible test questions)
Flashcards
35 cards
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Practice quiz
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Host live
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Questions
35
Answers
1
How many neutrons are in cobalt-59?
28
32
18
27
2
Which of the following electron transitions would most likely emit light in the red orange?
n=5 to n=4
n=2 to n=5
n=1 to n=5
n=6 to n=1
3
Which of the following elements has the greatest attraction for its electrons?
C
O
Li
Ne
4
Which two scientists' work gave us our current model of the atom?
Heisenberg and Schrodinger
Bohr and de Broglie
Becquerel and Curie
Rutherford and Chadwick
5
Which is the correct formula for the compound chromium (II) nitrate?
CrNO2
(Cr)2NO3
Cr2NO3
Cr(NO3)2
6
Which of the following contains a central atom that is an exception to the octet rule?
CH4
H2O
BH3
NH3
7
How many sig figs are in the number 0.000120?
3
6
5
2
8
Which of the following is the correct formula for dichlorine heptoxide?
Cl2O5
Cl2O6
Cl2O7
ClO3
9
Emission of light from an atom occurs when an electron ____.
jumps from a lower to a higher energy level
moves within its atomic orbital
drops from a higher to a lower energy level
falls into the nucleus
10
What is the charge on the lead ion in PbS
2
?
2+
2-
4+
4-
11
Which of the following contributes to the increase in ionization energy from left to right?
more electrons in the outermost energy level
an increase in the number of protons
an increase in the size of the nucleus
the shielding effect is unchanged
12
In the compound PCl
3
, how many valence electrons are present?
26
8
24
4
13
The correct name for H
2
S is...
hydrosulfuric acid
dihydrogen monosulfide
sulfurous acid
sulfuric acid
14
Potassium has 3 isotopes. Which of the three is the most abundant?
K-40
They're equally abundant.
K-41
K-39
15
Where are electrons located in an atom?
At the center of the nucleus
In circular orbits around the nucleus
In clouds outside the nucleus
Embedded in the nucleus
16
An O
2-
ion contains ___ electrons.
10
16
34
2
17
In general, atomic radii...
increase down a group, increase across a period
increase down a group, decrease across a period
decrease down a group, increase across a period
increase down a group, remain constant across a period
18
Which of the following is an s-block element?
C
Cs
Cd
Cl
19
Select the correctly rounded answer to the following problem: 2.3 x 5.25
12.08
12
12.075
12.1
20
Which group of the periodic table forms only 2+ ions?
Group 17
Group 12
Group 1
Group 2
21
The orbital diagram shown violates...
Aufbau Principle
Pauli Exclusion Principle
None of the orbital diagram rules
Hund's Rule
22
Which of the following sets places molecular shapes in order of DECREASING bond angles?
trigonal planar > trigonal pyramidal > bent (2 lone pairs)
trigonal pyramidal > bent (2 lone pairs) > trigonal planar
trigonal planar > bent (2 lone pairs) > trigonal pyramidal
bent (2 lone pairs) > trigonal planar > trigonal pyramidal
23
A molecule has 4 atoms bonded and 1 lone pair of electrons on the central. What is the shape?
trigonal bipyramidal
see-saw
tetrahedral
square pyramidal
24
Isotopes of a given element have the same # of __, but different #'s of __ in their nucleus
neutrons, protons
protons, neutrons
electrons, protons
neutrons, electrons
25
Which of the following sets of data would be best represented by a bar graph?
melting point of different substances organized by mass
energy of electromagnetic radiation organized by wavelength
temperature outside recorded every hour for 24 hours
number of students wearing various brands of shoes
26
Coulombic attraction is the force of attraction between ___ charged particles.
oppositely
like
negatively
positively
27
Which is the correct formula for the compound formed between beryllium and nitrogen?
Be3N2
BeN
Be2N3
Be2N
28
Which of the following scientists is generally credited with the discovery of the electron?
Chadwick
Thomson
Moseley
Dalton
29
Which of the following is NOT part of Dalton's Atomic Theory?
All matter is composed of small particles called atoms
The number of protons in an atom is it atomic number
Atoms cannot be divided, created, or destroyed
In chemical reactions, atoms are rearranged
30
Which of the following electron configurations represents potassium?
[Ne]3s1
[Ar]4s1
[Ne]3s23p3
[Xe]6s24f145d106p4
31
The element with the electron configuration [Ne]3s
2
3p
2
is...
S
Si
Mg
C
32
Rank K, Li, and Cs in order of DECREASING ionization energy.
K > Cs > Li
Li > K > Cs
Cs > Li > K
Cs > K > Li
33
Round 27,350 to 3 significant figures.
274
27,400
28,000
27,300
34
Which is the correct name for the compound (NH
4
)
2
SO
4
?
Ammonium (II) Sulfate
Nitrogen Hydrosulfite
Nitrogen Hydrogen Sulfate
Ammonium Sulfate
35
What molecular shape does CCl
4
have?
tetrahedral
trigonal planar
bent
octahedral
