The higher oxide of an element (E) has the formula EO3. Its hydride contains 2.47% hydrogen, the element is
Si
S
Se
Te
Out of the following metals, the one which requires radiation of highest frequency to cause emission of electrons is
Ca
K
Mg
Na
The property which does not reflect the periodicity of the elements is
Ionisation energy
Electro negativity
Neutron/ proton ratio
Bonding behaviour
Number of liquid elements present in the periodic table is
2
3
14
36
The elements which form anions most readily are
Alkali metals
Halogens
Oxygen family
Nitrogen group
The element which forms an amphoteric oxide is
Barium
Calcium
Chlorine
Beryllium
The correct order of decreasing ionic character is
Bacl2 >Mgcl2> Cacl2> Be cl2
Cacl2> Mgcl2>Becl2>Bacl2
Bacl2>Cacl2>Mgcl2> Becl2
Bacl2>Becl2>Cacl2> Mgcl2
Noble gases are group of elements which exhibit very
Minimum electronegativity
Low chemical activity
High chemical activity
High diamagnetic properties
On the basis of group valencies the formula of the compound formed between tin and fluorine is
SnF3
SnF4
SnF6
SnF
An element belongs to fourth period of p- block elements. It has 5 electrons in its outermost shell. Then, the correct statement regarding the element is
It belongs to group 15 and has 5 unpaired electrons.
It belongs to group 15 and has no unpaired electrons.
It belongs to group 14 and has 3 unpaired electrons.
It belongs to group 15 and has 3 unpaired electrons.
