Test
5. The Structure of Atoms
Preguntas del test (40)
1He found that passing electric current through some substances caused them to decompose, suggesting that the elements of a chemical compound are held together by electrical forces.
- AHumphry Davy
- BMichael Faraday
- CGeorge Stoney
- DJ.J. Thompson
2He determined the quantitative relationship between the amount of electricity used in electrolysis and the amount of chemical reactions occurring.
- AHumphry Davy
- BMichael Faraday
- CGeorge Stoney
- DJ.J. Thompson
3He suggested that the units of electrical charge associated with atoms be named electrons.
- AHumphry Davy
- BMichael Faraday
- CGeorge Stoney
- DJ.J. Thompson
4He performed the cathode-ray tube experiment and determined the ratio of the charge of the electron to its mass, which is 1.75882x10^8 Coulomb/gram.
- AHumphry Davy
- BMichael Faraday
- CGeorge Stoney
- DJ.J. Thompson
5He determined the charge of the electron through the famous "oil-drop experiment," in which he found that the charge of one electron was 1.60218x10^-19 Coulomb.
- AJ.J. Thompson
- BRobert Millikan
- CEugen Goldstein
- DErnest Rutherford
6He observed that the cathode-ray tube also produced positively charged particles, created when gaseous atoms lose electrons. This led to the idea of a unit positive charge residing in the proton.
- AJ.J. Thompson
- BRobert Millikan
- CEugen Goldstein
- DErnest Rutherford
7He discovered through the gold foil experiment that atoms consists of very small, very dense positively charged nuclei surrounded by clouds of electrons of relatively large distances from the nuclei.
- AJ.J. Thompson
- BRobert Millikan
- CEugen Goldstein
- DErnest Rutherford
8The number of protons in the nucleus of an atom determines its identity; this number is known as the __.
- Aatomic mass
- Batomic number
- Cmass number
- Dnucleon number
9These are atoms of the same element with different masses; they are atoms containing the same number of protons but different numbers of protons.
- AAllotropes
- BIsomers
- CIsotopes
- DStereoisomers
10It is the sum of the number of protons and neutrons in the nucleus of an atom.
- AAtomic Mass
- BAtomic Number
- CMass Number
- DNucleon Number
11These are instruments that measure the charge-to-mass ratio of charged particles.
- AChromatographs
- BElectron Microscopes
- CMass Spectrometers
- DThis technology does not yet exist.
12The Group 1A of the elements, except H, are called the __.
- Aalkali metals
- Balkaline earth metals
- Chalogens
- Dnoble (or rare) gases
13The Group 2A elements are called the __.
- Aalkali metals
- Balkaline earth metals
- Chalogens
- Dnoble (or rare) gases
14Group 7A elements are called __, which means "salt formers."
- Aalkali metals
- Balkaline earth metals
- Chalogens
- Dnoble (or rare) gases
15The Group 8A elements are called __.
- Aalkali metals
- Balkaline earth metals
- Chalogens
- Dnoble (or rare) gases
16__ character increases from top to bottom, and decreases from left to right. The opposite is the trend for __.
- AMetallic
nonmetallc - BNonmetallic
metallic - CThis question does not make sense.
- DThis will never be asked in the November 2015 board exam.
- AMetallic
17__ show some properties that are characteristic of both metals and nonmetals. Many of these elements are semiconductors.
- AMetals
- BNonmetals
- CMetalloids
- DNoble gases
18Semiconductors are insulators at __ temperatures, but conductors at __ temperatures.
- Ahigher
lower - Blower
higher - Cvarying
varying - Dany
any
- Ahigher
19The conductivities of metals __ with __ temperature.
- Aincrease
decreasing - Bdecrease
increasing - Cincrease
increasing - Ddecrease
decreasing
- Aincrease
20__ is the least metallic of the metals and is sometimes classified as a metalloid. It is metallic in appearance and an excellent conductor of electricity.
- AAluminum
- BBarium
- CGallium
- DSilicon
21The __ is the distance between any two adjacent identical points of a wave.
- Aamplitude
- Bfrequency
- Cwavelength
- DNone of the above
22The __ is the number of wave crests passing a given point per unit time.
- Aamplitude
- Bfrequency
- Cwavelength
- DNone of the above
23Wavelength and frequency are __ proportional to each other.
- Adirectly
- Binversely
- Cirregularly
- DScientists have not yet discovered the answer.
24It is a form of energy that consists of electric and magnetic fields that vary repetitively at right angles to each other.
- AElectrical energy
- BElectromagnetic radiation
- CHeat
- DKinetic energy
25It was __ that first recorded the separation of sunlight into its component colors by allowing it to pass through a glass prism.
- AAlbert Einstein
- BIsaac Newton
- CJ.J. Thompson
- DMichael Faraday
26It is a region in space which the probability of finding an electron is high.
- AAtomic orbital
- BNuclear orbital
- CElectronic region
- DNuclear region
27Each of the possible states of electrons is described by four quantum numbers. We can use theses quantum numbers to designate electronic arrangements in all atoms, their so-called __.
- Aelectron configurations
- Belectron orbitals
- Celectron cloud
- Dperiodic arrangement
28This quantum number describes the main energy level, or shell, that an electron occupies. It may be any positive integer: 1, 2, 3, 4, ...
- APrincipal quantum number (m)
- BAngular momentum quantum number (l)
- CMagnetic quantum number (m_l)
- DSpin quantum number (m_s)
29Within a shell, different sublevels or subshells are possible, each with a characteristic shape. This quantum number designates a sublevel, or specific shape of atomic orbital that an electron may occupy. This number may take integral values from 0 up to and including (n-1): 0, 1, 2, ... , (n-1)
- APrincipal quantum number (n)
- BAngular momentum quantum number (l)
- CMagnetic quantum number (m_l)
- DSpin quantum number (m_s)
30This quantum number designates a specific orbital within a subshell. Within each subshell, it may take any integral values from -l through zero up to and including +l: (-l), ..., 0, ..., (+l)
- APrincipal quantum number (n)
- BAngular momentum quantum number (l)
- CMagnetic quantum number (m_l)
- DSpin quantum number (m_s)
31This quantum number refers to the spin of an electron and the orientation of the magnetic field produced by this spin. For every set of quantum numbers (except this one), it can take the value of +1/2 or -1/2.
- APrincipal quantum number (n)
- BAngular momentum quantum number (l)
- CMagnetic quantum number (m_l)
- DSpin quantum number (m_s)
32It corresponds to the electron configuration of an isolated atom in its lowest energy or unexcited state.
- ACombined state
- BGround state
- CStable state
- DSteady state
33Each atom of an element is "built-up" by (1) progressively adding the appropriate number of protons and neutrons in the nucleus as specified by the atomic and mass numbers, and (2) adding the necessary number of electrons into orbitals in the way that gives the lowest total energy for the atom.
- AAufbau Principle
- BPauli Exclusion Principle
- CHund's Rule
- DPeriodic Law
34No two electrons in an atom may have identical sets of four quantum numbers.
- AAufbau Principle
- BPauli Exclusion Principle
- CHund's Rule
- DPeriodic Law
35Electrons occupy all the orbitals of a given subshell singly before paring begins. These unpaired electrons have parallel spins.
- AAufbau Principle
- BPauli Exclusion Principle
- CHund's Rule
- DPeriodic Law
36Substances that contain unpaired electrons are weakly attracted into magnetic fields and are said to be __.
- Adiamagnetic
- Bferromagnetic
- Cmetamagnetic
- Dparamagnetic
37Those which all electrons are paired are very weakly repelled by magnetic fields, and are called __.
- Adiamagnetic
- Bferromagnetic
- Cmetamagnetic
- Dparamagnetic
38__ is much stronger than paramagnetism, such that it allows a substance to become permanently magnetized when placed in a magnetic field. Only three free elements exhibit this.
- ADiamagnetism
- BFerromagnetism
- CMetamagnetism
- DParamagnetism
39It is an assembly of two protons and two neutrons.
- AAlpha Particle
- BBeta Particle
- CGamma Particle
- DHiggs-Boson Particle
40These are two or more orbitals that have the same energy.
- ADegenerate orbitals
- BIsoelectronic orbitals
- CIsokinetic orbitals
- DRegenerative orbitals
Información
- Descripción
- The Structure of Atoms
- Autor
- Dodong Aleta
- Idioma
- English
- Visitas
- 112
- Etiquetas
- Valoración
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