metallic and non metallic properties
Why do we say Cs has the highest metallic character even though theoretically Fr is higher?
This is because it is too radio active and unstable for its properties to be observed
What happens to the melting point of metals when you go down a group?
It decreases
Which is the most reactive metal?
Francium
What is Ionization energy measured in?
Kilo Joule per mole
Arrange the following elements based on the group number they belong to:
halogens, transition metals, noble gases, alkali metals
alkali metals, transition metals, halogens, noble gases
What happens to a metallic and non metallic character of an element when you go:
i) across a period
ii) down a group
i) metallic decreases and non metallic increases
ii) metallic increases and non metallic decreases
What happens to the boiling point when you go across a period?
It increases up to group 14 and then decreases.
What happens to reactivity when you go across a period?
It first decreases and then increases
Give two other names for Ionization Potential
Ionization energy, Ionization Enthalpy
What happens to the density of an element when you go down across a period?
It increases to a maximum and then decreases slightly
Arrange the following elements in descending order based on their metallic character:
Mg, Al, Fr, Ca, Cs
Fr, Cs, Ca, Mg, Al
Based on the melting and boiling point of the given elements, state their state of matter taking room temperature as 25 degrees celcius.
Element Melting point Boiling point
x -217 -62
y -12 32
z 84 122
x is a gas
y is a liquid
z is a solid
Which is the most reactive non metal? State its group and electronic configuration.
Fluorine; group 17; 2,7
What happens to Ionization Potential when:
i) Atomic size increases
ii) Nuclear charge decreases
iii) When you go down a group
i) Decreases
ii) Decreases
iii) Decreases
Arrange the following elements based on the order in the periodic table:
Silicon, Fluorine, Beryllium, Argon, Neon
Beryllium, Fluorine, Neon, Silicon, Argon