John Newlands was a chemist who worked in a sugar factory.
In 1866 he designed a periodic table.
He arranged the elements in order of their relative atomic masses.
He found a repeating pattern for some of the elements.
Newlands wrote, 'the eighth element starting from a given one, is a kind of repetition of the
first, like the eighth note in an octave of music'.
1.
H
2......
F
CI
Co, Ni
Br
1
Pd
Pt, Ir
Li
Na
K
Cu
Rb
Ag
Cs
TI
G
Mg
Ca
Zn
Sr
Cd
Ba, V
Bo
Pb
Al
Cr
Y
Ce, La
U
Ta
с
Th
Si
Ti
In
Zr
Sn
Hg
Newlands' periodic table
W
N
P
Mn
As
Di, Mo
Sb
Nb
Bi
O
S
Fe
Se
Ro, Ru
Te
Au
(a)
In Newlands' periodic table, the elements lithium, sodium and potassium are
grouped together.
Os
Give two properties of these elements which support the idea that they should be
grouped together.
