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Semester 1 Review Flashcards | StudBud
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Semester 1 Review
Semester 1 Review
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Chemistry
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28 cards
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Questions
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Answers
1
What is the highest energy level that is occupied in calcium?
3
4
1
2
2
Which sequence lists these blocks in s-p-d-f order?
Y-Z-W-X
X-Y-Z-W
W-Y-X-Z
Y-W-Z-X
3
The picture shows a model of the element...
beryllium
helium
fluorine
oxygen
4
How many valence electrons does the atom in the figure below have?
2
8
20
10
5
Which of the following sections of the periodic table contain only metals?
Period 6
Group 2
Period 2
Group 18
6
Which grouping best represents the relative size of the alkali metals?
a
b
d
c
7
Select the one INCORRECT answer about orbitals.
Total number of electrons in the p orbital is 6.
3rd energy levels contain s, p, d, and f orbitals.
there are 5 d orbitals in the 3rd energy level.
the s orbital can hold up to 2 electrons.
8
Arrange selenium, strontium, and silicon in decreasing atomic radius.
strontium > selenium > silicon
silicon > selenium > strontium
strontium > silicon > selenium
selenium > silicon > strontium
9
What is the maximum number of electrons in the second energy level?
32
18
8
2
10
Which statement correctly describes the energy of electrons in the given energy levels?
The first level has the same energy as the second level.
The first level has more energy than second level.
The third level has more energy than the second level.
The third level has less energy than the second level.
11
How many different elements are represented by the nuclei in the table?
4
3
1
2
12
What are the atomic number and mass number of this atom?
atomic #= 11 , mass #=19
atomic #= 9 , mass #=20
atomic #= 9 , mass #=11
atomic #= 11 , mass #=20
13
What best describes the current atomic theory?
Atoms are composed of electrons in a cloud around a nucleus.
Atoms can easily be split.
An atom's mass is determined by the mass of its neutrons.
Atoms consist of neutrons circling around a nucleus.
14
Which of the following properties decreases from left to right across a period?
atomic number
electronegativity
atomic radius
ionization energy
15
What is the electron configuration of selenium?
[Ar]3d104s24p4
[Ar]4s13d54p25s13d54p2
[Ar]4s23d104p4
[Ar]4s24p43d10
16
All atoms are...
neutral, protons equal electrons, which equals neutrons.
positively charged.
negatively charged.
neutral, with number of protons equaling number of electrons
17
Element found in which shaded area of this periodic table undergo the fewest chemical reactions
q
s
t
r
18
Which of the following is true of a metal?
has a high electronegativity.
Tends to gain electrons and form negative ions.
Does not conduct.
Usually has 4 valence electrons or less.
19
Which letter represents 1s
2
2s
2
2p
6
3s
2
3p
6
?
y
z
x
w
20
Given 1s
2
2s
2
2p
4
, how many electrons are in its outer level?
4
6
8
2
21
Which is a unique characteristic of the bonding between metal atoms?
Must give away electrons to reach a stable octet.
Share valence electrons with neighboring atoms.
Require additional electrons to reach a stable octet.
Share electrons to create a sea of electrons.
22
Atoms of noble gases are generally inert because...
they are neutral atoms.
their outer electron levels are filled.
they are not charged.
they are too large to react.
23
Which element has the electron configuration [Kr]5s
2
4d
10
5p
4
?
tellurium
molybdenium
xenon
sellenium
24
A jeweler cut a small chip off a large diamond. How does the chip compare to the original?
Density of the chip is smaller than the original.
Impossible to tell.
Density of the chis is the same as the original.
Density of the chip is larger than the original.
25
If you took all the atoms out of a chair, what would be left?
The chair would still be there, but it would weigh less.
The chair would be exactly the same as it was before.
Only a pool of liquid would be left on the floor.
There would be nothing left of the chair.
26
What does the number 84 in the name krypton-84 represent?
number of protons
average atomic mass
atomic number
mass number
27
What is the empirical formula of C
6
H
8
O
6
?
C3H4O3
CHO
C2H4O2
CH2O
28
The correct electron configuration of beryllium is?
1s22s2
1s2
1s22s1
1s22s22p2
