Elements of which group form anions most readily -
Oxygen family
Nirogen group
Halogens
Alkali metals
With the increase in atomic number in period
Metallic character decreases
Metallic character increases
Chemical reactivity decreases
Chemical reactivity increases
Arrange F, Cl, O, N in the decreasing order of electronegativity -
O > F > N > Cl
F > N > Cl > O
Cl > F > N > O
F > O > N = Cl
In which of the following process highest energy is required
Cu → Cu+
Al → Al+
Zn → Zn+
Li → Li+
The element with smallest size in the 4th period is
Chlorine
Iodine
Fluorine
Bromine
About how many known elements are there -
10
50
100
200
Elements belonging to the same group have similar properties because
They have similar electronic configuration of the outermost shell
Their atomic numbers go on increasing as we move down the group
All of them are metallic elements
They are metalliods.
Arrange S, O and Se in ascending order of electron affinity
Se < S < O
Se < O < S
S < O < Se
S < Se < O
Which one of the following ions has the highest value of ionic radius -
O2-
B3+
Li+
F-
