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Chemistry Mid-term
Chemistry Mid-term
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1
What is the correct name for Sn
oxygen
copper
tin
cobalt
2
What element is shown in the following orbital configurations
Silicon
phosphorus
Gold
3
What are the maximum number of orbitals in the p subshell?
5
2
3
4
4
Compared to the alkali metals,the alkaline-earth metals
are less dense
have lower melting points
have less valence electrons
are less reactive
5
The person whose work led to a periodic table based on increasing atomic number was?
mosely
medeleev
thompson
6
Metals are malleable because the metallic bonding
makes them metallic
makes them hammerable
makes them sturdy
7
Multiple covalent bonds may occur in atoms that contain carbon,nitrogen or
oxygen
hydrogen
water
8
Which is an example of crystal lattice
smooth structure
ionic,rigged structure
bionic
9
What is the correct name for Co
Sodium
gold
silicon
Cobalt
10
The number 6.022x10^23 represents the _____ in a molecule
neutrons
protons
atoms
electrons
11
What is the correct definition of ground state?
highest energy state of the atom
lowest energy state of an atom
middle energy state of an atom
12
The total number of electrons needed to fill the energy level n=6 is
35
32
30
26
13
Which of the following measurements are all the zeros considered to be nonsignificant figures?
0.0037
506
60.0
400.
14
" orbitalsof equalenergy are occupied by one electron before any orbital is occupied by a secondelectron" is what rule?
Thompson
medeleev
Hunds
Rutherford
15
Ionic compounds are considered brittle because
they break easy
fixed positions
they are hammerable
16
Argon,krypton and xenon are
noble gases
actinides
alkaline earth metals
metals
17
The atomic number of the atom indicates
number of neutrons
number of electrons
number of atoms
number of protons
18
Which of the following measurements correctly describes 34.5 km
density
length
volume
mass
19
What are the elements on the zig zag line called
metals
gases
nonmetals
metalloids
20
Whats the shape of carbon tetraiodide
linear
bent
tetrahedral
triagonal
21
Which of the following measurements correctly describes 276 K
length
temperature
density
mass
22
Which of the following measurements correctly describes 1.59 g/ml
temperature
density
volume
mass
23
[PO
4]
3
is an example of what
polyatomic
bent
triagonal
24
Whats stronger Ionic compound or Covalent compounds
Ionic
Covalent
25
Where are the nonmetals on a periodic table?
On the staircase
to the right of the staircase
to the left of the staircase
26
How many protons does K have
19
20
3
4
27
Which of the following measurements correctly describes .75 mL
mass
volume
length
density
28
The distance between corresponding points on a wave is the wave's
wavelength
height
length
radius
29
Which is the correct definition for covalent bond
bond between two nonmetals
bond between two metals
30
Hydrogen is placed separately from other elements in the periodic table because
has 1 electron
is a gas
unique properties
It is different
31
Which of the following measurements correctly describes 3.5g
density
temperature
mass
volume
32
How many electrons are in period 2
2
18
8
32
33
What is the correct name for Na
gold
silicon
sodium
Silver
34
Experiments with cathode rays led to JJ thompson's discovery of
bellas really fat
electrons
neutrons
protons
35
The ground state electron configuration for an atom of indium is?
[kr]5s^1 4d^9 5p^1
[kr]5s^2 4d^10 5p^1
[kr]5s^2 4d^8 5p^3
[kr]5s^1 4d^9 5p^10
36
Which is a physical change
burning
rusting
boiling
37
Elements in a group in the periodic table can be expected to have similar
atomic numbers
properties
atomic masses
numbers of neutrons
38
Which are the 7 diatomic elements
C,A,O,Cl,Br
C,Au,Ag,Mu,F,Cl
C,N,O,F,Cl,Br,I,H
39
Which element has the following ground-state ekectron configuration 1s^2 2s^2 2p^6 3s^2
Magnesium
Silver
Cobalt
Gold
40
What is the correct answer for bond energy
Energy taking space to break a chemical bond and form neutral isolated atom
Energy not required to break a chemical bond and form neutral isolated atom
Energy required to break a chemical bond and form neutral isolated atoms
41
who discovered the nucleus?
Rutherford
medeleev
thompson
Bella
42
Which element has the following ground state electron configuration [Kr]5s^2 4d^10 5p^3
Sb
Cl
Ag
Si
43
Whats the shape of Hydrogen chloride
linear
triagonal
bent
44
Which are properties of noble gases
nonreactive
bellas fat
reactive
metals
45
How many atoms of fluorine are present in a molecule of carbon tetrafluoride
2
4
1
3
46
protons plus neutrons equal the atom's
mass
atomic mass
atomic number
47
What element matches this electron configuration 1s
2
2s
2
2p
6
3s
3
3p
6
4s
2
3d
10
4p
6
4d
10
5s
2
5p
6
6s
2
4f
14
5d
9
Gold
Silicon
Magnesium
Silver
48
One half the distance between the nuclei of identical atoms that are bonded together is called the
electron cloud
atomic diameter atomic volume
atomic volume
atomic radius
49
Valence electrons are
the outermost layer of electrons,involved in bonding
The innermost layer of electrons not involved in bonding
50
Elements on the right end of the periodic table (group-18) have properties most associated with
gases
metalloids
metals
51
Ionic compounds are metals and nonmetals
False
True
52
What is the correct name for Fe
cobalt
silicon
Iron
tin
53
What elements are noble gases
O,H,Fe,Ag
Au,Si,Co,O,Na
He,Ne,Ar,Kr,Xe,Rn
54
How many unshared pairs of electrons are in this orbital diagram
2
4
1
3
55
The horizontal rows of the periodic table are called?
family
groups
Period
56
Who discovered the electron
medeleev
Einstein
thompson
Rutherford
57
Whats an example of chemical change
rusting
boiling
melting
cutting
58
Which color of light in the visible spectrum has the longest wavelength, lowest energy?
violet
yellow
blue
red
59
Which element has the following ground state electron configuration [Kr]5s^2 4d^9
Cl
Ag
Co
Sb
60
Which of the following designates the sublevels that exist in energy level n=2
s,p
s,p,d,f
s,p,d
s
61
Which has the greater ionization As or Cl
As
Cl
62
How many double bonds are in the Lewis structure for hydrogen Fluoride
4
2
0
3
63
Define VSEPR theory
electron repulsion
atomic mass
ionic bonds
64
Isotopes of an element contain different numbers of neutrons
protons
neutrons
electrons
65
Which are the correct steps of the scientific method
Question, research,hypothesis,experiment,data analysis,conclusion,communica
communication, research,hypothesis,experiment,data analysis,conclusion,ques
hypothesis,question, research,experiment,data analysis,conclusion,communica
66
What is the correct name for Si
copper
sodium
silicon
silver
67
Which is an example of a heterogeneous mixture
Water
Air
steel
Trail mix
68
An atom is electrically neutral because
it just is
neutrons=protons
protons=protons
protons=electrons
69
How many electrons are in the d subshell
11
9
4
10
70
Whats the shape of CO
2
bent
linear
triagonal
71
Elements in the D block have properties of
metals
gases
metalloids
nonmetals
