35423717
Descripción
Test por Brianna Lalinde, actualizado hace más de 1 año
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Creado por Brianna Lalinde
hace casi 3 años
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Pregunta 1
Pregunta
Determine the total number of electrons present in the atom, molecule or ion below: N2
Respuesta
-
10
-
9
-
12
-
14
Pregunta 2
Pregunta
A gamma ray of wavelength 1.00 X 10^-8 cm has enough energy to remove an electron from a hydrogen atom
Respuesta
- True
- False
Pregunta 3
Pregunta
How many protons are in a 127 I- ion?
Respuesta
-
55
-
54
-
50
-
53
Pregunta 4
Pregunta
Determine the total number of electrons present in the atom, molecule or ion below: BH3
[blank_start]8[blank_end]
Respuesta
-
8
Pregunta 5
Pregunta
Which of the following pairs can be used to illustrate the law of multiple proportions?
Respuesta
-
NO and NO2
-
H20 and HCl
-
NH4 and NH4Cl
-
ZnO2 and ZnCi2
-
CH4 and CO2
Pregunta 6
Pregunta
After an anion has lost an electron it becomes a/an and has a charge.
Respuesta
-
Anion, Positive
-
Isotope, Positive
-
Anion, Negative
-
Cation, Positive
-
Compound, Positive
Pregunta 7
Pregunta
Which one of the following substance is not a chemical compound?
Respuesta
-
Co
-
HF
-
H2S
-
NO
Pregunta 8
Pregunta
When strontium salt is ignited it burns with a red flame. The frequency of the light given of by this flame is greater than
Respuesta
-
Gamma rays
-
x-rays
-
yellow light
-
ultraviolet light
-
infrared light
Pregunta 9
Pregunta
How many electrons are present in Be2+ ion?
Respuesta
-
4
-
6
-
2
-
9
-
7
Pregunta 10
Pregunta
A pure substance composed of two or more different elements is a(n)? [blank_start]Compound[blank_end]
Respuesta
-
Compound
Pregunta 11
Pregunta
An atom containing 34 Protons 43 Neutrons and 34 electrons would have the symbol?
Respuesta
-
77Se
-
77Ir
-
77Tc
-
43Se
-
43Te
Pregunta 12
Pregunta
The scientist who discovered the law of conservation of mass and is called the father of modern chemistry is?
Respuesta
-
Lavoisier
-
Boule
-
Rutherford
-
Avagadro
Pregunta 13
Pregunta
Which of the following is incorrect?
Respuesta
-
the lowest possible energy state of a molecule or atom is called it's ground state
-
diffraction produces both constructive and destructive interference
-
the emission spectrum of hydrogen contains a continuum of colors
-
Niels Bohr developed a quantum model for the hydrogen atom
-
All matter displays both particle and wavelike characteristics
Pregunta 14
Pregunta
Mendeleev is given the most credit for the concept of periodic table elements because:
Respuesta
-
he grouped elements into traids of similar properties
-
he emphasized it's usefulness in predicting the existence and properties in unknown elements
Pregunta 15
Pregunta
Wherever it is found water always contains oxygen and hydrogen in the mass ration 8 to 1. taken by itself this fact demonstrates what natural law?
Respuesta
-
conservation of mass
-
definite composition
-
multiple proportions
-
the atomic theory
-
periodicity
Pregunta 16
Pregunta
Rutherford bombarded gold foil with alpha (a) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?
Respuesta
-
the small size of the nucleus
-
the charge on the nucleus
-
the total mass of an atom
-
the existence of protons
-
the presence of electrons outside the nucleus
Pregunta 17
Pregunta
which of these isotopes have the greatest number of neutrons?
Respuesta
-
38 Cl
-
40 Ar
-
40 K
-
40 Ca
-
38 Sc
Pregunta 18
Pregunta
which of the following is an example of quantitative observation?
Respuesta
-
the piece of metal is longer than a piece of wood
-
solution 1 is much darker than solution 2
-
the liquid in beaker A is blue
-
the temp. of liquid is 60 degrees C
-
at least two of the above observations
Pregunta 19
Pregunta
Fe has that is unpaired in it's d orbitals
Respuesta
-
one electron
-
two electrons
-
three electrons
-
four electrons
Pregunta 20
Pregunta
Infrared radiation from the sun has a wavelength of 6200nm. Calculate the energy of one photon of that radiation
Respuesta
-
4.1 x 10 -39 J
-
4.1 x 10 -30 J
-
3.2 x 10 -29 J
-
3.2 x 10 -26 J
-
between 10-20 and 10-19 J
Pregunta 21
Pregunta
How many protons and electrons are present in Br- ion? [blank_start]35p 36e[blank_end]
Respuesta
-
35p 36e
Pregunta 22
Pregunta
An atom of the isotope chlorine-39 consists of the photons, neutrons and electrons? [blank_start]17p 22n 17e[blank_end]
Respuesta
-
17p 22n 17e
Pregunta 23
Pregunta
Which mass law is demonstrated here?
Respuesta
-
Law of conservation of mass
-
law of definite composition
-
law of conservation of mass and law of definite compositions
-
law of conservation of mass and law of multiple proportions
Pregunta 24
Pregunta
The chemist credited for inventing a set of symbols for writing elements and system for writing the formulas of compounds (and for discovering selenium, silicon, and thorium) is:
Respuesta
-
Bohr
-
Berzelius
-
Planck
-
Maldeeve
Pregunta 25
Pregunta
A [blank_start]element[blank_end] is a pure substance that is composed of only one type of atom.
Respuesta
-
element
Pregunta 26
Pregunta
What is the correct symbol for Potassium? [blank_start]K[blank_end]
Respuesta
-
K
Pregunta 27
Pregunta
[Ne]3s^2 3p^5 [blank_start]Cl, 1[blank_end]
Respuesta
-
Cl, 1
Pregunta 28
Pregunta
The first scientist to show that atoms emit any negative particles was?
Respuesta
-
J.J Thompson
-
William Thompson
-
John Dalton
-
Ernest Rutherford
Pregunta 29
Pregunta
Rutherford's experiment with alpha particles scattering by gold foil established that?
Respuesta
-
Electrons are negative
-
Electrons bounce
-
Protons are not evenly distributed
Pregunta 30
Pregunta
The scientist who discovered the law of conservation of mass and is also called the modern father of chemistry? [blank_start]Lavoisier[blank_end]
Respuesta
-
Lavoisier
Pregunta 31
Pregunta
What is the name of the element with the symbol Cr? [blank_start]Chromium[blank_end]
Respuesta
-
Chromium
Pregunta 32
Pregunta
Consider the following two compounds: H20 and H2O2, according the the law of multiple proportions the ration of hydrogen atoms per gram of oxygen in H2O to hydrogen atoms per gram of oxygen in H2O2 is
Respuesta
-
2;2
-
3;2
-
1;2
-
2;1
Pregunta 33
Pregunta
What is the I quantum number for 4f orbitals? [blank_start]3[blank_end]
Respuesta
-
3
Pregunta 34
Pregunta
How many electrons in an atom can have the quantum numbers n=3, I=2? [blank_start]10[blank_end]
Respuesta
-
10
Pregunta 35
Pregunta
Which subatomic particle was discovered using cathode ray? [blank_start]Electrons[blank_end]
Respuesta
-
Electrons
Pregunta 36
Pregunta
Bluetooth headsets use microwave radiation with a wave length of 12.32cm, what is the frequency of the light given of the electromagnetic radiations (s-1) Enter is expo format. [blank_start]2.43E9[blank_end]
Respuesta
-
2.43E9
Pregunta 37
Pregunta
J.J Thompson
Respuesta
-
discovered the nucleus
-
measured the charge of electron
-
discovered x-rays
-
measured the charge/mass ratio of an electron
-
invented the cathode ray tube
Pregunta 38
Pregunta
What is the number of Neutrons and electrons in the ion 209Bi2+ [blank_start]207[blank_end]
Respuesta
-
207
Pregunta 39
Pregunta
Who is credited with discovering the atomic nucleus? [blank_start]Rutherford[blank_end]
Respuesta
-
Rutherford
Pregunta 40
Pregunta
Which inventor is mismatched?
Respuesta
-
Lavoisier; law of conservation of mass
-
Proust; mass of an electron
-
Dalton; atomic theory
-
Mendeleev; periodic table
-
Arrhenius; acids produce H+ in water
Pregunta 41
Pregunta
Determine the total number of electrons present in the atom; NH4+ [blank_start]10[blank_end]
Respuesta
-
10
Pregunta 42
Pregunta
Which mass is demonstrated by the observation that a sample of potassium chloride from Chile contains the same percent by mass of potassium as one from Poland? [blank_start]Law of definite composition[blank_end]
Respuesta
-
Law of definite composition
Pregunta 43
Pregunta
Which of the following is classified as an element?
Respuesta
-
I2
-
NO
-
KCl
-
C6H12O6
-
CO
Pregunta 44
Pregunta
Which of the following statements refers to the Heisenberg uncertainty principles?
Respuesta
-
It is impossible to accurately know both the exact location and momentum of a particle
-
The exact position of an electron is uncertain
Pregunta 45
Pregunta
A hypothesis is a
Respuesta
-
mathematical formula that models a pattern of behavior
-
concise statement of a behavior that is always the same under the same conditions
-
set of experiments designed to test a theory
-
well tested, unifying principle that explains facts
-
tentative explanation or predictions based upon experimental observations
Pregunta 46
Pregunta
The number of nucleons (Protons and Neutrons) in a 236U2+ nucleus? [blank_start]236[blank_end]
Respuesta
-
236
Pregunta 47
Pregunta
All of the following are true except?
Respuesta
-
the n=3 shell has no f subshell
-
there are three p orbitals in every shell of an atom then n=1 shell
-
all s orbitals have a spherical shape
-
each d subshell has five d orbitals
-
the energiesof subshell in the shells (energy levels) of a hydrogen atom vary as s<p<d etc.
Pregunta 48
Pregunta
According to the Aufbau principle which sublevel is filled after the 5s sublevel?
Respuesta
-
5p
-
4f
-
3d
-
4d
-
5d
Pregunta 49
Pregunta
What is the atomic mass for the halogen that lies in period 5?
Respuesta
-
131.3 amu
-
127.6 amu
-
approx. 210
-
53 amu
Pregunta 50
Pregunta
Which of the following sets of elements have the [noble gas] ns^2 np^2
Respuesta
-
O, S, Se, Te, Po
-
N, P, As, Sb, Bi
-
Cl, Br, I, At
-
C, Si, Ge, Sn, Pb
-
Tl, Zr, hf
Pregunta 51
Pregunta
How many unpaired electrons are there in the ground state of a manganese atom?
Respuesta
-
1
-
2
-
4
-
5
-
0
Pregunta 52
Pregunta
How many unpaired electrons are there in a manganese atom?
Respuesta
-
1
-
2
-
4
-
5
-
0
Pregunta 53
Pregunta
Rank the following atoms in order of the largest to the smallest atomic radius: Al, P, Cl, K
Respuesta
-
K>Al>P>Cl
-
Al>K>P>Cl
-
P>Al>K>Cl
-
K>P>Al>Cl
Pregunta 54
Pregunta
Larger first ionization energy, Li or Be? [blank_start]Be[blank_end]
Respuesta
-
Be
Pregunta 55
Pregunta
Which of the following process represents the ionization energy of bromine?
Respuesta
-
Br(I) -> Br+ (g) + e-
-
Br(g) -> Br+ (g) + e-
-
Br(S) -> Br+ (S) + e-
-
Br(S) -> Br+ (g) + e-
-
Br2(g) -> Br2+ (g) + e-
Pregunta 56
Pregunta
How many electrons can be contained in the orbitals of a subshell with I=3?
Respuesta
-
10
-
14
-
6
-
7
-
5
Pregunta 57
Pregunta
In a given period this group has the element with the largest atomic radius.
Respuesta
-
Group 3A
-
Group 4A
-
Group 2A
-
Group 1A
-
Group 5A
Pregunta 58
Pregunta
What set of the elements below includes just the nonmetals?
GA, P, Ra, Li, La, Xe
Respuesta
-
P, I, Xe
-
P, I, La
-
I, Xe, Ra
-
Ga, P, Xe
-
P, I, Li
Pregunta 59
Pregunta
Which of these subshells is incorrect?
Respuesta
-
5s
-
2p
-
3f
-
4d
-
4f
Pregunta 60
Pregunta
Which of the following subshells in a typical polyelectronic atom fills last?
Respuesta
-
1s
-
4d
-
4s
-
5p
-
More info. is needed =
Pregunta 61
Pregunta
In a modern periodic table, the order in which the elements are placed is based on
Respuesta
-
atomic mass
-
mass number
-
atomic series
-
atomic number
-
atomic size
-
chemical reactivity
Pregunta 62
Pregunta
Which of the following atoms is a non-metal?
Respuesta
-
Fr
-
Ge
-
N
-
Hg
-
None of these are non-metals
Pregunta 63
Pregunta
Hydrogen and lithium react very differently, although they are both members of Group 1. What is the primary reason for this difference?
Respuesta
-
Electron affinity increases going down a group
-
The metallic character increases going down a group
-
The ionization energy increases going down
-
There is a very large difference in the atomic radii of H and Li
-
Electronegativity increases going down a group
Pregunta 64
Pregunta
With increasing value of the quantum number l, subshells are named s, p, d, f, g, h, i, etc.
How many l=4 orbitals are allowed in a l=4 subshell?
Enter your answer as a whole number without units.
[blank_start]9[blank_end]
Respuesta
-
9
Pregunta 65
Pregunta
Consider the following orderings.
I.
Na + < Mg 2+ < Al 3+ < Si 4+
II.
Be < Mg < Ca < Sr
III.
I < Br < Cl < F
IV.
Al < Si < P < Cl
Which of these give(s) a correct trend in ionization energy?
Respuesta
-
1, 3,4
-
none of them
-
2, 4
-
1, 4
-
3
Pregunta 66
Pregunta
Ionization energy increases with an increasing number of electrons
Respuesta
- True
- False
Pregunta 67
Pregunta
An atom of which of the following elements has the smallest atomic radius?
Respuesta
-
At
-
F
-
I
-
Br
-
Cl
Pregunta 68
Pregunta
Determine the number of unpaired electrons in ground state atoms of P and Cl, respectively.
Respuesta
-
5, 3
-
5, 1
-
3,1
-
3,2
-
3, 5
Pregunta 69
Pregunta
What is the number of unpaired electrons in sulfur atom?
Respuesta
-
1
-
2
-
3
-
4
Pregunta 70
Pregunta
Give the ground-state electron configuration, symbol, and group number from each partial (valence-level) orbital diagram.
Respuesta
-
[Xe] 5s24d3; Ta; 5B (5)
-
[Kr] 5s24d3; Nb; 5B (5)
-
[Ar] 5s24d3; V; 5B (5)
-
[Kr] 5s24d3; Tc; 7B (7)
-
none of these
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