519951
Questão 1
Questão
Newlands table was disregarded by other scientist because after Calcium the properties did not match very well?
Responda
- True
- False
Questão 2
Questão
Mendeleev's table is what the modern Periodic Table is based on?
Responda
- True
- False
Questão 3
Questão
When did scientists discover Protons and Electrons?
Responda
-
Beginning of the 18th Century
-
End of the 18th Century
-
Beginning of the 19th Century
-
End of the 19th Century
-
Beginning of the 20th Century
-
End of the 20th Century
Questão 4
Questão
Which group is unreactive?
Responda
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
0
Questão 5
Questão
When you go down the groups of elements what happens to the level of attraction?
Responda
-
It gets stronger
-
It stays the same
-
it gets weaker
Questão 6
Questão
What are Group 1 Elements called?
Responda
-
Alkali Metals
-
Alkene Metals
Questão 7
Questão
What bonds do Alkali Metals form?
Responda
-
Ionic
-
Covalent
-
Giant Covalent
Questão 8
Questão
Transition metals are found between groups 2&3?
Responda
- True
- False
Questão 9
Questão
Select the correct statements about transition metals:
Responda
-
They all have higher melting and boiling points than the alkali metals
-
They all have higher melting and boiling points than the alkali metals, except for Mecury
-
They all have higher melting and boiling points than the alkali metals, except for Chronium
-
They conduct heat and electricity well
-
They don't conduct heat and electricity at all
-
Most are used as alloys
-
They react slowly or not at all
-
They don't react
-
They form positive ions
-
They form negative ions
Questão 10
Questão
Group 7 are know as Halogens?
Responda
- True
- False
Questão 11
Questão
Halogens are non-metallic
Responda
- True
- False
Questão 12
Questão
Halogens have :
Responda
-
Low boiling point and a high melting point
-
Low boiling point and a low melting point
-
High boiling point and a high melting point
-
High boiling point and a low melting point
Questão 13
Questão
A more reactive halogen will displace a less reactive one?
Responda
- True
- False
Questão 14
Questão
Hard water:
Responda
-
Creates scum
-
Creates lather
-
Contains Magnesium and Calcium ions
Questão 15
Questão
The benefits of Hard Water are:
Responda
-
The calcium is good for our bones and teeth
-
Reduces the risk of heart disease
-
Increases chance of cancer
-
Costs more
Questão 16
Questão
How do we remove Hard Water?
Responda
-
Ion Exchange column
-
Add washing soda
-
Boiling it
-
Freezing it
-
Compressing it
Questão 17
Questão
A modern water filter uses Carbon as its main material?
Responda
- True
- False
Questão 18
Questão
Using Washing Soda to soften water means that your precipitate out all calcium and magnesium ions along with any other insoluble carbonates.
Responda
- True
- False
Questão 19
Questão
Exothermic means
Responda
-
Loses energy
-
Gains energy
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