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Who first ordered elements by atomic mass?
Who created the law of octaves for ordering elements?
Who created the modern periodic table?
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.
What is unusual about the pair of elements tellurium (Te, Z = 52) and iodine (I, Z = 53)?
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
True or false? In the modern periodic table, elements are arranged by mass number.
True or false? Larger atoms lose electrons more easily and gain electrons less easily than smaller atoms.
Which of these are the most reactive in their respective groups?
Potassium, Group 1
Fluorine, Group 7
Chlorine, Group 7
Sodium, Group 1
Rubidium, Group 1
Bromine, Group 7
Which of these are properties of alkali metals?
They have a low density
They form coloured compounds and solutions
They form white compounds and colourless solutions
They have high melting and boiling points
They have low melting and boiling points
They have a high density
True or false? Caesium is less reactive than lithium as reactivity decreases going down the group.
What ion would you expect potassium (K) to form?
What do alkali metals produce on reaction with water?
Which of these are properties of transition metals?
True or false? Transition metals corrode easily.
What colour are copper (II) ions?
Which of these is the correct formula of vanadium (V) oxide?
Which of these are properties of the halogens?
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
True or false? Reactivity in the halogens decreases going down the group.
Which of these ions would you expect iodine (I) to form?
Which halogen would displace chloride ions?