874489
Questão 1
Questão
Who first ordered elements by atomic mass?
Responda
-
Mendeleev
-
Dalton
-
Newlands
Questão 2
Questão
Who created the law of octaves for ordering elements?
Responda
-
Mendeleev
-
Dalton
-
Newlands
Questão 3
Questão
Who created the modern periodic table?
Responda
-
Mendeleev
-
Dalton
-
Newlands
Questão 4
Questão
True or false? The reason why Mendeleev's periodic table worked was because he left gaps for undiscovered elements which may have had similar properties.
Responda
- True
- False
Questão 5
Questão
What is unusual about the pair of elements tellurium (Te, Z = 52) and iodine (I, Z = 53)?
Responda
-
Tellurium has similar properties to the halogens and is placed with them, while iodine has similar properties to Group 6 and is placed with them
-
Tellurium has a higher relative atomic mass than iodine
-
Tellurium has 7 outer electrons although it is placed in Group 6, and iodine has 6 outer electrons but is placed in Group 7
Questão 6
Questão
True or false? In the modern periodic table, elements are arranged by mass number.
Responda
- True
- False
Questão 7
Questão
True or false? Larger atoms lose electrons more easily and gain electrons less easily than smaller atoms.
Responda
- True
- False
Questão 8
Questão
Which of these are the most reactive in their respective groups?
Responda
-
Potassium, Group 1
-
Fluorine, Group 7
-
Chlorine, Group 7
-
Sodium, Group 1
-
Rubidium, Group 1
-
Bromine, Group 7
Questão 9
Questão
Which of these are properties of alkali metals?
Responda
-
They have a low density
-
They form coloured compounds and solutions
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They form white compounds and colourless solutions
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They have high melting and boiling points
-
They have low melting and boiling points
-
They have a high density
Questão 10
Questão
True or false? Caesium is less reactive than lithium as reactivity decreases going down the group.
Responda
- True
- False
Questão 11
Questão
What ion would you expect potassium (K) to form?
Responda
-
K+
-
K2+
-
K-
-
K2-
Questão 12
Questão
What do alkali metals produce on reaction with water?
Responda
-
Metal chlorides
-
Metal nitrates
-
Metal sulphates
-
Metal hydroxides
-
Metal oxides
Questão 13
Questão
Which of these are properties of transition metals?
Responda
-
They have a low density
-
They have a high density
-
They form white compounds and colourless solutions
-
They form coloured compounds and solutions
-
They have low melting and boiling points
-
They have high melting and boiling points
Questão 14
Questão
True or false? Transition metals corrode easily.
Responda
- True
- False
Questão 15
Questão
What colour are copper (II) ions?
Responda
-
Red
-
Green
-
Blue
Questão 16
Questão
Which of these is the correct formula of vanadium (V) oxide?
Responda
-
VO5
-
V5O
-
V2O5
-
V5O2
Questão 17
Questão
Which of these are properties of the halogens?
Responda
-
Low melting and boiling points
-
High melting and boiling points
-
Exist as diatomic molecules
-
Exist as free radicals
-
Good conductors of electricity
-
Poor conductors of electricity
Questão 18
Questão
True or false? Reactivity in the halogens decreases going down the group.
Responda
- True
- False
Questão 19
Questão
Which of these ions would you expect iodine (I) to form?
Responda
-
I+
-
I2+
-
I-
-
I2-
Questão 20
Questão
Which halogen would displace chloride ions?
Responda
-
Iodine
-
Bromine
-
Astatine
-
Fluorine
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