21558343
Descripción
Test por Kate Larsen, actualizado hace más de 1 año
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Creado por Kate Larsen
hace alrededor de 4 años
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Pregunta 1
Pregunta
Which of the following is a characteristic of robust scientific knowledge?
Respuesta
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It is frequently re-examined.
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It develops over a short duration of time.
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It has been disproven several times.
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It is rarely subjected to arguments.
Pregunta 2
Pregunta
Which of the following provides evidence to support Bohr's theory of atomic orbitals?
Respuesta
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Plum Pudding Model
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Gold foil experiment
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Radiation produced when beryllium is bombarded with alpha particles
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Spectrum of colors emitted by gas.
Pregunta 3
Pregunta
Which of the following observations indicates that an atom has neutrons?
Respuesta
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Some uncharged particles bounce back from gold foil when it is bombarded with alpha particles.
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Some uncharged particles are scattered by a beryllium atom when it hits gold foil.
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A radiation with neutral particles is emitted when alpha particles strike beryllium atoms.
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A radiation which attracts electrons is produced when a beryllium atom is bombarded with alpha particles.
Pregunta 4
Pregunta
The table shows the charge on three unknown subatomic particles. Which particle is most likely present in the nucleus of an atom?
Respuesta
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Only particle C
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Only particle A
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Both particles B and C
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Both particles A and B
Pregunta 5
Pregunta
The table shows the number of charged subatomic particles in an ion. A negatively charged substance is brought near the ion. What will most likely happen and why?
Respuesta
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The ion will repel the substance because it has more protons than electrons.
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The ion will repel the substance because it has more electrons than protons.
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The ion will attract the substance because it has more protons than electrons.
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The ion will attract the substance because it has more electrons than protons.
Pregunta 6
Pregunta
What is the highest point of a wave called?
Respuesta
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Trough
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Frequency
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Crest
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Amplitude
Pregunta 7
Pregunta
A football player experiences acute pain in his knee. Which of the following methods can a doctor use to diagnose the reason for the pain?
Respuesta
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Use x-ray radiation to see if there are any fractured bones
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Use radio waves emitted by radioactive substances to look at bones
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Use infrared radiation from warm objects to look inside the knees
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Use radiations emitted by very hot objects to penetrate the skin and bones.
Pregunta 8
Pregunta
What term is used to describe the lowest energy level of a particle?
Respuesta
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Excited state
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Ground state
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Photon
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Emission spectrum
Pregunta 9
Pregunta
An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition?
Respuesta
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A random amount of light was released.
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A random amount of light was absorbed.
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A fixed amount of energy was released.
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A fixed amount of energy was absorbed.
Pregunta 10
Pregunta
This is represented by the letter n. n is the first number that describes the probable position of every electron and can be any whole number from 1 to 7.
Respuesta
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Principle atomic number
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Principle quantum number
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Principle electron number
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Principle ionic number
Pregunta 11
Pregunta
The table compares the number of electrons in two unknown neutral atoms. Use this information to determine the number of valence electrons in the atoms. Which of the following correctly compares the stability of the two atoms?
Respuesta
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Both are highly reactive.
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Both are unreactive.
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A is unreactive and D is reactive.
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D is unreactive and A is reactive.
Pregunta 12
Pregunta
A substance is present in the gaseous state at room temperature. Which of the following best explains the probable position of the substance in the periodic table?
Respuesta
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It is between groups 1 to 12 because it is a metal.
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It is between groups 1 to 12 because it is a nonmetal.
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It is between groups 13 to 18 because it is a metal.
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It is between groups 13 to 18 because it is a nonmetal.
Pregunta 13
Pregunta
Which of the following groups of elements are likely to have substances that are both metallic and non-metallic properties?
Respuesta
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Group 18
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Lanthanides
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Group 14
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Actinides
Pregunta 14
Pregunta
This group of elements is silvery and shiny. They are extremely reactive because they lose their outer electron easily to form a cation. Because of this, they cannot exist alone in nature.
Respuesta
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Alkaline metals
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Alkali metals
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Transition metals
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Metalloids
Pregunta 15
Pregunta
Which of the following properties increase down a column in the periodic table?
Respuesta
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Ionic radii
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Effective nuclear charge
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Number of valence shell electrons
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Ionization energy
Pregunta 16
Pregunta
Which of the following correctly compares the radii of Cl and Cl−?
Respuesta
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Cl has a smaller radius than Cl− because Cl has an expanded electron cloud
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Cl has a larger radius than Cl− because Cl− has an additional energy shell.
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Cl has a larger radius than Cl− because Cl has an additional energy shell.
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Cl has a smaller radius than Cl− because Cl− has an expanded electron cloud.
Pregunta 17
Pregunta
Which of the following explains how Albert Einstein tried to influence the discovery of the energy equation?
Respuesta
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He supported the use of radioactive elements for medical diagnostic purposes.
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He opposed the use of nuclear fusion during the Manhattan project.
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He recommended applying the principles of nuclear fission to defend against enemies.
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He recommended uncontrolled fusion for medical testing and treatment.
Pregunta 18
Pregunta
Which of the following is true for a reliable scientific source?
Respuesta
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It cites opinions.
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It cites logic.
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It cites valid data.
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It cites common sense.
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