Periodic Table Flashcards
How does the elements’ metallic property changes from left to right across the period?
It decreases down the period.
How does the metallic property change down Group I?
The atom size of Group I metals increases down the group. This increases the distance between the nucleus and the valence electrons, making the electrostatic forces of attraction weaker. Hence, it is harder for the atoms to gain electrons to attain the octet structure.
How does the melting point change down Group I?
The melting points of Group I metals decreases down the group. This is because the ion size of Group I metals increases down the group. Hence, less energy is required to remove the electrons to form metallic cations.
How does the reactivity change down Group I?
The metals become more reactive down the group. This is because the atomic radius increases down the group. Less energy is required to overcome the attractive forces between the nucleus and the valence electrons. Hence, less energy is required to remove the electrons from the valence shell, making it more reactive down the group.
How does the boiling point change down Group VII?
The boiling points of Group VII elements increases down the group due to the increase in strength of the intermolecular forces of attraction between molecules as the size and relative atomic mass of the atoms increase. More energy is required to overcome the stronger intermolecular forces of attraction.
How does the reactivity change down group VII?
The reactivity of the halogens decreases down the group. This is due to the decrease in electronegativity of Group VII elements.
How does the melting point change down group 0?
Because the atoms increase in atomic size down the group, there will be an increase in the number of electrons. This leads to increase in the weak interatomic forces of attraction among the atoms. Hence, more energy is required to overcome the increase in interatomic forces of attraction, leading to an increase in boiling points down the group.
What are the uses of helium?
Helium can fill weather balloons and airships as it has a low density and is lighter than air.
What are the uses of neon?
Neon can be used for advertising lights.
What are the uses of argon?
Argon can be used to fill light bulbs as it is unreactive even at high temperatures and protects the white hot filament from reaction with air. It is also used in the manufacturing of steel.
