8099988
Descrição
Quiz por Oscar Patterson, atualizado more than 1 year ago
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Criado por Oscar Patterson
aproximadamente 7 anos atrás
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Questão 1
Questão
does Exothermic reactions give out more energy when new bonds are made
Responda
- True
- False
Questão 2
Questão
How many electrons can go in each of the shells around the nucleus?
Responda
-
2 in first shell and 8 in the next energy levels
-
7 in the first shell and 10 in the next energy levels
-
does not matter
Questão 3
Questão
what is the atomic number
Responda
-
number of protons + number of neutrons
-
number of protons
-
number of neutrons
Questão 4
Questão
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.
Responda
-
positive
-
negative
-
neutral
-
negative
-
positive
-
neutral
Questão 5
Questão
In endothermic reactions more energy is needed to break bonds of reactions
Responda
- True
- False
Questão 6
Questão
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.
Responda
-
yellow/orange
-
lilac
-
brick-red
-
blue-green
-
lilac
-
yellow/orange
-
brick-red
-
blue-green
-
brick-red
-
yellow/orange
-
lilac
-
blue-green
-
blue-green
-
yellow/orange
-
lilac
-
brick-red
Questão 7
Questão
Why is barium sulfate safe to drink?
Responda
-
because its insoluble. ( can't enter the bloodstream)
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because it is opaque
Questão 8
Questão
why can simple molecular covalent substances not conduct electricity?
Responda
-
because they have no ions
-
they have weak forces between bonds
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they have small molecules
Questão 9
Questão
Ionic bonds form when a metal reacts with a non-metal
Responda
- True
- False
Questão 10
Questão
covalent bonds form between atoms of non - metal elements
Responda
- True
- False
Questão 11
Questão
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]
Responda
-
1
-
+1
-
1
-
0
-
-1
-
-1
-
1
-
0
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