2837127
Descripción
Test por Peter Hoskins, actualizado hace más de 1 año
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Creado por Peter Hoskins
hace más de 9 años
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Pregunta 1
Pregunta
Chlorine occurs naturally as two isotopes.
Chlorine contains 75% chlorine–35 and 25% chlorine–37.
Calculate the Relative Atomic Mass of chlorine
Respuesta
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35
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36.2
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35.5
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36
Pregunta 2
Pregunta
Which of these is true regarding covalent bonding:
Respuesta
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Takes place between non-metals
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Involves sharing of electrons
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An example of a covalent compound is methane
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All of these answers
Pregunta 3
Respuesta
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Metallic bonding
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Ionic bonding
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Covalent bonding
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Isotropic bonding
Pregunta 4
Pregunta
In order to form calcium chloride:
Respuesta
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The calcium atom loses two electrons
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Two chlorine atoms each receive one electron
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One Ca2+ and two Cl- ions are formed
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All of these answers
Pregunta 5
Pregunta
The magnesium ion is:
Respuesta
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Mg2+
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Mg+
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Mg2-
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Mg-
Pregunta 6
Pregunta
In sodium chloride the following ions are formed:
Respuesta
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Na- Cl-
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Na- Cl+
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Na+ Cl-
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Na+ Cl+
Pregunta 7
Pregunta
Which of these facts about solid sodium chloride is false:
Respuesta
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It has a high melting point
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It has a high boiling point
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It conducts electricity
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The ions are held together by electrostatic forces
Pregunta 8
Pregunta
Ionic bonding involves:
Respuesta
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Sharing of electrons between atoms
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Atoms gaining or losing electrons and becoming neutral overall
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Atoms gaining or losing electrons and becoming charged overall
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The loss or gain of protons
Pregunta 9
Pregunta
The formula for magnesium oxide is:
Respuesta
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Mg2O
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MgO2
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MgO
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Mg2O3
Pregunta 10
Respuesta
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The same number of protons
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The same number of neutrons
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The same mass number
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Different numbers of electrons
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