13933249
Descrição
Quiz por Vivian Lol, atualizado more than 1 year ago
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Criado por Vivian Lol
quase 6 anos atrás
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Questão 1
Questão
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].
Responda
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building block of an element
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substances
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neutrons
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electrons
Questão 2
Questão
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].
Responda
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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
Questão 3
Responda
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Electronic configuratin
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Shorthand notation
Questão 4
Questão
Check all the right answers.
Why does reactivity increase moving down group1?
Responda
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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
Questão 5
Questão
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.
Responda
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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
Questão 6
Questão
Transition metals.....
Responda
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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
Questão 7
Questão
Group 1 elements are strong and hard.
Responda
- True
- False
Questão 8
Questão
Check all right answers.
Group1 elements...
Responda
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Have low melting points
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Are strong and hard
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Are high coloured
Questão 9
Questão
Ionic Compounds are solids at room temperature
Responda
- True
- False
Questão 10
Questão
Ionic compounds have low densities.
Responda
- True
- False
Questão 11
Questão
Ionic compunds are soluble in water.
Responda
- True
- False
Questão 12
Questão
Check all right answers.
Covalent Compounds......
Responda
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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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