13933249
Descripción
Test por Vivian Lol, actualizado hace más de 1 año
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Creado por Vivian Lol
hace casi 6 años
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Pregunta 1
Pregunta
What is an atom?
An atom is the [blank_start]building block of an element[blank_end].
All [blank_start]substances[blank_end] are made of atoms, they contain protons, [blank_start]neutrons[blank_end] and [blank_start]electrons[blank_end].
Respuesta
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building block of an element
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substances
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neutrons
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electrons
Pregunta 2
Pregunta
What is an electronic configuration?
It is the [blank_start]arrangement[blank_end] of [blank_start]electrons[blank_end] in [blank_start]energy shells[blank_end] around the [blank_start]nucleus[blank_end] in the [blank_start]atom[blank_end].
Respuesta
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arrangement
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electrons
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energy shells
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nucleus
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atom
Pregunta 3
Respuesta
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Electronic configuratin
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Shorthand notation
Pregunta 4
Pregunta
Check all the right answers.
Why does reactivity increase moving down group1?
Respuesta
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because the radius of the atom decreases
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because the radius of the atom increases
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the valence electron decreases and it becomes easier for the atom to lose its valence electrons
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the force of attraction between nucleus and the valence electron decreases
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the valence electron becomes far away from the nuclues
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the valence electron decreases and it becomes harder for the atom to lose its valence electrons
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the valence electron becomes closer to the nucleus
Pregunta 5
Pregunta
Explain how group II metals are less reactive than group I.
Atoms of group 2 metals have [blank_start]2[blank_end] valence electrons, while atoms of group 1 metals have [blank_start]1[blank_end] valence electrons. It is [blank_start]more difficult[blank_end] to lose [blank_start]2[blank_end] valence electrons than losing just [blank_start]1[blank_end] electron.
Respuesta
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2
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1
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more difficult
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2
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1
Pregunta 6
Pregunta
Transition metals.....
Respuesta
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A.Form coloured compounds
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B. Are good conductors of heat and electricity
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C. Are malebale
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D. Are less reactive than alkali metals
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E. They are usually hard and tough
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F. All of the above
Pregunta 7
Pregunta
Group 1 elements are strong and hard.
Respuesta
- True
- False
Pregunta 8
Pregunta
Check all right answers.
Group1 elements...
Respuesta
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Have low melting points
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Are strong and hard
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Are high coloured
Pregunta 9
Pregunta
Ionic Compounds are solids at room temperature
Respuesta
- True
- False
Pregunta 10
Pregunta
Ionic compounds have low densities.
Respuesta
- True
- False
Pregunta 11
Pregunta
Ionic compunds are soluble in water.
Respuesta
- True
- False
Pregunta 12
Pregunta
Check all right answers.
Covalent Compounds......
Respuesta
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Can be solids
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Can't be liquids
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Have low melting and boiling points
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Can be gases
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Have high melting and boiling points
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Most of the covalent compounds dissolve in water
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Most of the covalnet compunds do not conduct electricity
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