Group O elements are:
Halogens
Alkali metals
Alkaline earth metals
Noble gases
The scientist who showed that atomic number is the fundamental property of an element.
Bragg
Peount
Hund
Moseley
The greatest credit for producing chemistry's most famous organization of elements is always given to:
Dobereiner
New lands
Mendeleev
Group I elements are called:
The highest first ionization energy in the periodic table is for:
Hydrogen
Chlorine
Zinc
Helium
Transition elements are:
D-block
P-block
S-block
F- block
The high boiling points of Carbon and Silicon in group IV is due to:
strong covalent bond
weak covalent bond
ionic bond
van der Waal's force of attraction
Lanthanides and Actinides are called:
D-block elements.
S-block elements.
F-block elements.
From top to bottom, atomic ratio:
increases.
decreases.
remain the same.
first increases then decreases.
The first ionization energy of neon is higher than that of:
Fluorine
Bromine
