Which of the elements has the least non-metallic character -
Fluorine
Chlorine
Bromine
Iodine
Which order of relative size amongst the following is incorrect?
Li < Na < K
C < Si < Al
Mg > Al < Na
F < Cl < Br
Arrange S, O and Se in ascending order of electron affinity
Se < S < O
Se < O < S
S < O < Se
S < Se < O
Which of the following is the correct order of relative size?
I- > I+ >I
I- > I > I+
I > I+> I-
I+ > I- > I
Which of the following is correct regarding ionic radii?
Ti4+ < Mn+7
35 Cl- < 37 Cl-
K+ > Cl-
P3+ > P5+
In which of the following process highest energy is required
Cu → Cu+
Al → Al+
Zn → Zn+
Li → Li+
The most metallic element in the fifth period is
Silver
Rubidium
Gold
Rhodium
The most metallic element in the fifth period is -
silver
rubidium
gold
rhodium
Elements of which group form anions most readily -
oxygen family
nitrogen group
halogens
alkali metals
Which scientist came up with the concept of a periodic table that included all of the known elements?
Joseph Priestly
Dmitri Mendeleev
Antonie Lavoisier
Albert Einstein
