Chemistry Final Material Quiz G9. 2018 2nd sem.

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Quiz on Chemistry Final Material Quiz G9. 2018 2nd sem., created by Vivian Lol on 26/05/2018.
Vivian Lol
Quiz by Vivian Lol, updated more than 1 year ago
Vivian Lol
Created by Vivian Lol almost 6 years ago
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Resource summary

Question 1

Question
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].
Answer
  • building block of an element
  • substances
  • neutrons
  • electrons

Question 2

Question
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].
Answer
  • arrangement
  • electrons
  • energy shells
  • nucleus
  • atom

Question 3

Question
What is this?
Answer
  • Electronic configuratin
  • Shorthand notation

Question 4

Question
Check all the right answers. Why does reactivity increase moving down group1?
Answer
  • because the radius of the atom decreases
  • because the radius of the atom increases
  • the valence electron decreases and it becomes easier for the atom to lose its valence electrons
  • the force of attraction between nucleus and the valence electron decreases
  • the valence electron becomes far away from the nuclues
  • the valence electron decreases and it becomes harder for the atom to lose its valence electrons
  • the valence electron becomes closer to the nucleus

Question 5

Question
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.
Answer
  • 2
  • 1
  • more difficult
  • 2
  • 1

Question 6

Question
Transition metals.....
Answer
  • A.Form coloured compounds
  • B. Are good conductors of heat and electricity
  • C. Are malebale
  • D. Are less reactive than alkali metals
  • E. They are usually hard and tough
  • F. All of the above

Question 7

Question
Group 1 elements are strong and hard.
Answer
  • True
  • False

Question 8

Question
Check all right answers. Group1 elements...
Answer
  • Have low melting points
  • Are strong and hard
  • Are high coloured

Question 9

Question
Ionic Compounds are solids at room temperature
Answer
  • True
  • False

Question 10

Question
Ionic compounds have low densities.
Answer
  • True
  • False

Question 11

Question
Ionic compunds are soluble in water.
Answer
  • True
  • False

Question 12

Question
Check all right answers. Covalent Compounds......
Answer
  • Can be solids
  • Can't be liquids
  • Have low melting and boiling points
  • Can be gases
  • Have high melting and boiling points
  • Most of the covalent compounds dissolve in water
  • Most of the covalnet compunds do not conduct electricity
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