Zusammenfassung der Ressource
Frage 1
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does Exothermic reactions give out more energy when new bonds are made
Frage 2
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How many electrons can go in each of the shells around the nucleus?
Frage 3
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what is the atomic number
Frage 4
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An ion is an atom or a group of atoms with a [blank_start]positive[blank_end] charge or a [blank_start]negative[blank_end] charge.
Antworten
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positive
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negative
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neutral
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negative
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positive
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neutral
Frage 5
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In endothermic reactions more energy is needed to break bonds of reactions
Frage 6
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Sodium gives a [blank_start]yellow/orange[blank_end] flame, potassium gives a [blank_start]lilac[blank_end] flame, calcium gives a [blank_start]brick-red[blank_end] flame and copper gives a [blank_start]blue-green[blank_end] flame.
Antworten
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yellow/orange
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lilac
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brick-red
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blue-green
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lilac
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yellow/orange
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brick-red
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blue-green
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brick-red
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yellow/orange
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lilac
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blue-green
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blue-green
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yellow/orange
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lilac
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brick-red
Frage 7
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Why is barium sulfate safe to drink?
Frage 8
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why can simple molecular covalent substances not conduct electricity?
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because they have no ions
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they have weak forces between bonds
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they have small molecules
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Ionic bonds form when a metal reacts with a non-metal
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covalent bonds form between atoms of non - metal elements
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protons relative mass is [blank_start]1[blank_end], neutrons relative masses [blank_start]1[blank_end] and electrons relative mass is [blank_start]-1[blank_end]