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Chem !; Test !

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Chemistry Quiz on Chem !; Test ! , created by Brianna Lalinde on 13/02/2022.
Brianna Lalinde
Quiz by Brianna Lalinde, updated more than 1 year ago
Brianna Lalinde
Created by Brianna Lalinde almost 3 years ago
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Resource summary

Question 1

Question
Determine the total number of electrons present in the atom, molecule or ion below: N2
Answer
  • 10
  • 9
  • 12
  • 14

Question 2

Question
A gamma ray of wavelength 1.00 X 10^-8 cm has enough energy to remove an electron from a hydrogen atom
Answer
  • True
  • False

Question 3

Question
How many protons are in a 127 I- ion?
Answer
  • 55
  • 54
  • 50
  • 53

Question 4

Question
Determine the total number of electrons present in the atom, molecule or ion below: BH3 [blank_start]8[blank_end]
Answer
  • 8

Question 5

Question
Which of the following pairs can be used to illustrate the law of multiple proportions?
Answer
  • NO and NO2
  • H20 and HCl
  • NH4 and NH4Cl
  • ZnO2 and ZnCi2
  • CH4 and CO2

Question 6

Question
After an anion has lost an electron it becomes a/an and has a charge.
Answer
  • Anion, Positive
  • Isotope, Positive
  • Anion, Negative
  • Cation, Positive
  • Compound, Positive

Question 7

Question
Which one of the following substance is not a chemical compound?
Answer
  • Co
  • HF
  • H2S
  • NO

Question 8

Question
When strontium salt is ignited it burns with a red flame. The frequency of the light given of by this flame is greater than
Answer
  • Gamma rays
  • x-rays
  • yellow light
  • ultraviolet light
  • infrared light

Question 9

Question
How many electrons are present in Be2+ ion?
Answer
  • 4
  • 6
  • 2
  • 9
  • 7

Question 10

Question
A pure substance composed of two or more different elements is a(n)? [blank_start]Compound[blank_end]
Answer
  • Compound

Question 11

Question
An atom containing 34 Protons 43 Neutrons and 34 electrons would have the symbol?
Answer
  • 77Se
  • 77Ir
  • 77Tc
  • 43Se
  • 43Te

Question 12

Question
The scientist who discovered the law of conservation of mass and is called the father of modern chemistry is?
Answer
  • Lavoisier
  • Boule
  • Rutherford
  • Avagadro

Question 13

Question
Which of the following is incorrect?
Answer
  • 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

Question 14

Question
Mendeleev is given the most credit for the concept of periodic table elements because:
Answer
  • he grouped elements into traids of similar properties
  • he emphasized it's usefulness in predicting the existence and properties in unknown elements

Question 15

Question
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?
Answer
  • conservation of mass
  • definite composition
  • multiple proportions
  • the atomic theory
  • periodicity

Question 16

Question
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?
Answer
  • 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

Question 17

Question
which of these isotopes have the greatest number of neutrons?
Answer
  • 38 Cl
  • 40 Ar
  • 40 K
  • 40 Ca
  • 38 Sc

Question 18

Question
which of the following is an example of quantitative observation?
Answer
  • 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

Question 19

Question
Fe has that is unpaired in it's d orbitals
Answer
  • one electron
  • two electrons
  • three electrons
  • four electrons

Question 20

Question
Infrared radiation from the sun has a wavelength of 6200nm. Calculate the energy of one photon of that radiation
Answer
  • 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

Question 21

Question
How many protons and electrons are present in Br- ion? [blank_start]35p 36e[blank_end]
Answer
  • 35p 36e

Question 22

Question
An atom of the isotope chlorine-39 consists of the photons, neutrons and electrons? [blank_start]17p 22n 17e[blank_end]
Answer
  • 17p 22n 17e

Question 23

Question
Which mass law is demonstrated here?
Image:
E1c93f8d20f2461495a692f33cefeef7 (binary/octet-stream)
Answer
  • 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

Question 24

Question
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:
Answer
  • Bohr
  • Berzelius
  • Planck
  • Maldeeve

Question 25

Question
A [blank_start]element[blank_end] is a pure substance that is composed of only one type of atom.
Answer
  • element

Question 26

Question
What is the correct symbol for Potassium? [blank_start]K[blank_end]
Answer
  • K

Question 27

Question
[Ne]3s^2 3p^5 [blank_start]Cl, 1[blank_end]
Answer
  • Cl, 1

Question 28

Question
The first scientist to show that atoms emit any negative particles was?
Answer
  • J.J Thompson
  • William Thompson
  • John Dalton
  • Ernest Rutherford

Question 29

Question
Rutherford's experiment with alpha particles scattering by gold foil established that?
Answer
  • Electrons are negative
  • Electrons bounce
  • Protons are not evenly distributed

Question 30

Question
The scientist who discovered the law of conservation of mass and is also called the modern father of chemistry? [blank_start]Lavoisier[blank_end]
Answer
  • Lavoisier

Question 31

Question
What is the name of the element with the symbol Cr? [blank_start]Chromium[blank_end]
Answer
  • Chromium

Question 32

Question
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
Answer
  • 2;2
  • 3;2
  • 1;2
  • 2;1

Question 33

Question
What is the I quantum number for 4f orbitals? [blank_start]3[blank_end]
Answer
  • 3

Question 34

Question
How many electrons in an atom can have the quantum numbers n=3, I=2? [blank_start]10[blank_end]
Answer
  • 10

Question 35

Question
Which subatomic particle was discovered using cathode ray? [blank_start]Electrons[blank_end]
Answer
  • Electrons

Question 36

Question
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]
Answer
  • 2.43E9

Question 37

Question
J.J Thompson
Answer
  • discovered the nucleus
  • measured the charge of electron
  • discovered x-rays
  • measured the charge/mass ratio of an electron
  • invented the cathode ray tube

Question 38

Question
What is the number of Neutrons and electrons in the ion 209Bi2+ [blank_start]207[blank_end]
Answer
  • 207

Question 39

Question
Who is credited with discovering the atomic nucleus? [blank_start]Rutherford[blank_end]
Answer
  • Rutherford

Question 40

Question
Which inventor is mismatched?
Answer
  • Lavoisier; law of conservation of mass
  • Proust; mass of an electron
  • Dalton; atomic theory
  • Mendeleev; periodic table
  • Arrhenius; acids produce H+ in water

Question 41

Question
Determine the total number of electrons present in the atom; NH4+ [blank_start]10[blank_end]
Answer
  • 10

Question 42

Question
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]
Answer
  • Law of definite composition

Question 43

Question
Which of the following is classified as an element?
Answer
  • I2
  • NO
  • KCl
  • C6H12O6
  • CO

Question 44

Question
Which of the following statements refers to the Heisenberg uncertainty principles?
Answer
  • It is impossible to accurately know both the exact location and momentum of a particle
  • The exact position of an electron is uncertain

Question 45

Question
A hypothesis is a
Answer
  • 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

Question 46

Question
The number of nucleons (Protons and Neutrons) in a 236U2+ nucleus? [blank_start]236[blank_end]
Answer
  • 236

Question 47

Question
All of the following are true except?
Answer
  • 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.

Question 48

Question
According to the Aufbau principle which sublevel is filled after the 5s sublevel?
Answer
  • 5p
  • 4f
  • 3d
  • 4d
  • 5d

Question 49

Question
What is the atomic mass for the halogen that lies in period 5?
Answer
  • 131.3 amu
  • 127.6 amu
  • approx. 210
  • 53 amu

Question 50

Question
Which of the following sets of elements have the [noble gas] ns^2 np^2
Answer
  • O, S, Se, Te, Po
  • N, P, As, Sb, Bi
  • Cl, Br, I, At
  • C, Si, Ge, Sn, Pb
  • Tl, Zr, hf

Question 51

Question
How many unpaired electrons are there in the ground state of a manganese atom?
Answer
  • 1
  • 2
  • 4
  • 5
  • 0

Question 52

Question
How many unpaired electrons are there in a manganese atom?
Answer
  • 1
  • 2
  • 4
  • 5
  • 0

Question 53

Question
Rank the following atoms in order of the largest to the smallest atomic radius: Al, P, Cl, K
Answer
  • K>Al>P>Cl
  • Al>K>P>Cl
  • P>Al>K>Cl
  • K>P>Al>Cl

Question 54

Question
Larger first ionization energy, Li or Be? [blank_start]Be[blank_end]
Answer
  • Be

Question 55

Question
Which of the following process represents the ionization energy of bromine?
Answer
  • 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-

Question 56

Question
How many electrons can be contained in the orbitals of a subshell with I=3?
Answer
  • 10
  • 14
  • 6
  • 7
  • 5

Question 57

Question
In a given period this group has the element with the largest atomic radius.
Answer
  • Group 3A
  • Group 4A
  • Group 2A
  • Group 1A
  • Group 5A

Question 58

Question
What set of the elements below includes just the nonmetals? GA, P, Ra, Li, La, Xe
Answer
  • P, I, Xe
  • P, I, La
  • I, Xe, Ra
  • Ga, P, Xe
  • P, I, Li

Question 59

Question
Which of these subshells is incorrect?
Answer
  • 5s
  • 2p
  • 3f
  • 4d
  • 4f

Question 60

Question
Which of the following subshells in a typical polyelectronic atom fills last?
Answer
  • 1s
  • 4d
  • 4s
  • 5p
  • More info. is needed =

Question 61

Question
In a modern periodic table, the order in which the elements are placed is based on
Answer
  • atomic mass
  • mass number
  • atomic series
  • atomic number
  • atomic size
  • chemical reactivity

Question 62

Question
Which of the following atoms is a non-metal?
Answer
  • Fr
  • Ge
  • N
  • Hg
  • None of these are non-metals

Question 63

Question
Hydrogen and lithium react very differently, although they are both members of Group 1. What is the primary reason for this difference?
Answer
  • 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

Question 64

Question
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]
Answer
  • 9

Question 65

Question
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?
Answer
  • 1, 3,4
  • none of them
  • 2, 4
  • 1, 4
  • 3

Question 66

Question
Ionization energy increases with an increasing number of electrons
Answer
  • True
  • False

Question 67

Question
An atom of which of the following elements has the smallest atomic radius?
Answer
  • At
  • F
  • I
  • Br
  • Cl

Question 68

Question
Determine the number of unpaired electrons in ground state atoms of P and Cl, respectively.
Answer
  • 5, 3
  • 5, 1
  • 3,1
  • 3,2
  • 3, 5

Question 69

Question
What is the number of unpaired electrons in sulfur atom?
Answer
  • 1
  • 2
  • 3
  • 4

Question 70

Question
Give the ground-state electron configuration, symbol, and group number from each partial (valence-level) orbital diagram.
Image:
08082 Xid24957194 1 (binary/octet-stream)
Answer
  • [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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