Chemistry
Complete the following sentences choosing the correct word or words from those given in brackets at the end of each sentence:
(i) The properties of the elements are a periodic function of their …………… (atomic number, mass number, relative atomic mass).
(ii) Moving across a …………… of the Periodic Table the elements show increasing …………… character (group, period, metallic, non-metallic).
(iii) The elements at the bottom of a group would be expected to show …………… metallic character than the element at the top (less, more).
(iv) The similarities in the properties of a group of elements are because they have the same …………… (electronic configuration, number of outer electrons, atomic numbers)
Related Questions
If an element is in Group 17, it is likely to be …………… [metallic/non-metallic] in character, while with one electron in its outermost energy level (shell), then it is likely to be …………… [metallic/non-metallic].
In Period 3, the most metallic element is …………… (sodium/magnesium/aluminium).
Give reasons for the following:
(i) The size of a Cl- ion is greater than the size of a Cl atom.
(ii) Argon atom is bigger than chlorine atom.
(iii) Chlorine is less reactive than fluorine.
(iv) Inert gases do not form ion.
Define the term 'ionisation potential'.