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Chemistry Midterm Review Flashcards | StudBud
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Chemistry Midterm Review
Chemistry Midterm Review
40 terms
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Review of atomic structure, electron configuration, the periodic table, ions, and isotopes.
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
What is the atomic number for sodium?
23
9
5
11
2
There are 2 unpaired electrons in the ground state of Arsenic.
False
True
3
Which of the following is a diatomic gas?
Magnesium
Bromine
Chlorine
Iodine
4
What is the correct scientific notation for 0.000058?
58 x 10-6
5.8 x 10-5
5.8 x 105
5
Cl is larger than Cl-.
True
False
6
An atom with 30 protons ad 40 neutrons has a mass number of ____.
70
40
30
65
7
Bromine is best classified as...
Metalloid
Metal
Solid
Nonmetal
8
Which element does the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
5
represent?
Mn
Ca
Cr
Fe
9
The short-hand (noble gas) configuration for In starts with [Ar]
True
False
10
Are these elements in the same group or period? K, Ca, and Br.
Both
neither
period
group
11
The number of orbitals in a
d
-subshell, regardless of energy level is
2
10
3
5
12
The number of electrons in the highest electron level of a neutral atom of Calcium is _____.
8
2
40
20
13
The charge on a neutron is not positive.
True
False
14
What neutral element has 32 neutrons and 27 electrons?
praseodymium
cobalt
chlorine
germanium
15
How many protons does fluoride ion have?
10
9
20
19
16
What happens when water freezes?
Chemical Change
Chemical Property
Physical Change
Physical Property
17
The maximum number of electrons that can be accommodated in the principal energy level n=3 is?
18
2
8
6
18
What does average atomic mass average?
Isotopes
Atomic Numbers
Protons
Protons, Neutrons, & Electrons
19
Cs has more shielding than Na.
True
False
20
If one isotope has a mass of 90 and is 40% abundant and the other isotopic mass is 92, what is the average atomic mass?
92.5 amu
91.5 amu
91.2 amu
90.8 amu
21
Si has a larger radius than Cl.
True
False
22
When mixing Country - Time Lemonade there was extra solute left over...so it is
Heterogenous Mixture
Atomos
Water
Homogeneous Mixture
23
What elements lose electrons to form cations?
Nonmetals
Metals
Transition Metals
Negative Ions
24
This group's name means "basic"
Alkaline
Noble
Alkali
Halogen
25
Looking at the ionization energy chart below, what happens across a period?
Generally Decreases
Decreases, then increases
Inceases, then decreases
Generally Increases
26
Sr has a smaller radius than I.
False
True
27
When Cesium reacts with Water is a type of...
Chemical Change
Physical Property
Chemical Property
Physical Change
28
Which has the shortest wavelength?
Radio
Microwave
Infrared
Gamma rays
29
What element is located in period 4, group 15?
titanium
sulfur
arsenic
antimony
30
What element is this?
K
V
Cr
Mn
31
What element has 22 protons?
phosphorus
zinc
titanium
sodium
32
What is the charge on an ion from group 7A (17)?
+2
-2
-1
+1
33
Groups "3-12" are the transition metals
False
True
34
How many valence electrons are there in any main group elements that become ions? (either cations or anions)
2
6
18
8
35
Which would be isoelectric?
Cl and Ar-
Sb3- and I-
B3+ and C4-
Si4- and Al3+
36
How many valence electrons does silicon have?
28
4
6
14
37
Which of the following is best to measure the volume of water?
beaker
Erlenmeyer flask
test tube
graduated cylinder
38
Which scientist put the elements in order of increasing atomic number.
Dalton
Mendeleev
Moseley
Democritus
39
Which subshell is higher in energy, 1s or 3s?
3s
They have the same amount of energy.
1s
Dog, really?
40
What is the charge on an ion from group 2?
+2
-1
-2
+1
