Mean
hints
l
n
h
n
tests
d
d
g
H
hl
hn
hh
nv
d
dp
gb
Hydrogen
He
hl
hn
hh
nv
d
dp
gb
Helium
Li
hl
hn
hh
nv
d
dp
gb
Lithium
Be
hl
hn
hh
nv
d
dp
gb
Beryllium
B
hl
hn
hh
nv
d
dp
gb
Boron
C
hl
hn
hh
nv
d
dp
gb
Carbon
N
hl
hn
hh
nv
d
dp
gb
Nitrogen
O
hl
hn
hh
nv
d
dp
gb
Oxygen
F
hl
hn
hh
nv
d
dp
gb
Fluorine
Ne
hl
hn
hh
nv
d
dp
gb
Neon
Na
hl
hn
hh
nv
d
dp
gb
Sodium
Mg
hl
hn
hh
nv
d
dp
gb
Magnesium
Al
hl
hn
hh
nv
d
dp
gb
Aluminium
Si
hl
hn
hh
nv
d
dp
gb
Silicon
P
hl
hn
hh
nv
d
dp
gb
Phosphorus
S
hl
hn
hh
nv
d
dp
gb
Sulphur
Cl
hl
hn
hh
nv
d
dp
gb
Chlorine
Ar
hl
hn
hh
nv
d
dp
gb
Argon
K
hl
hn
hh
nv
d
dp
gb
Potassium
Ca
hl
hn
hh
nv
d
dp
gb
Calcium
Sc
hl
hn
hh
nv
d
dp
gb
Scandium
Ti
hl
hn
hh
nv
d
dp
gb
Titanium
V
hl
hn
hh
nv
d
dp
gb
Vanadium
Cr
hl
hn
hh
nv
d
dp
gb
Chromium
Mn
hl
hn
hh
nv
d
dp
gb
Manganese
Fe
hl
hn
hh
nv
d
dp
gb
Iron
Co
hl
hn
hh
nv
d
dp
gb
Cobalt
Ni
hl
hn
hh
nv
d
dp
gb
Nickel
Cu
hl
hn
hh
nv
d
dp
gb
Copper
Zn
hl
hn
hh
nv
d
dp
gb
Zinc
Ga
hl
hn
hh
nv
d
dp
gb
Gallium
Ge
hl
hn
hh
nv
d
dp
gb
Germanium
As
hl
hn
hh
nv
d
dp
gb
Arsenic
Se
hl
hn
hh
nv
d
dp
gb
Selenium
Br
hl
hn
hh
nv
d
dp
gb
Bromine
Kr
hl
hn
hh
nv
d
dp
gb
Krypton
Rb
hl
hn
hh
nv
d
dp
gb
Rubidium
Sr
hl
hn
hh
nv
d
dp
gb
Strontium
Y
hl
hn
hh
nv
d
dp
gb
Yttrium
Zr
hl
hn
hh
nv
d
dp
gb
Zirconium
Nb
hl
hn
hh
nv
d
dp
gb
Niobium
Mo
hl
hn
hh
nv
d
dp
gb
Molybdenum
Tc
hl
hn
hh
nv
d
dp
gb
Technetium
Ru
hl
hn
hh
nv
d
dp
gb
Ruthenium
Rh
hl
hn
hh
nv
d
dp
gb
Rhodium
Pd
hl
hn
hh
nv
d
dp
gb
Palladium
Ag
hl
hn
hh
nv
d
dp
gb
Silver
Cd
hl
hn
hh
nv
d
dp
gb
Cadmium
In
hl
hn
hh
nv
d
dp
gb
Indium
Sn
hl
hn
hh
nv
d
dp
gb
Tin
Sb
hl
hn
hh
nv
d
dp
gb
Antimony
Te
hl
hn
hh
nv
d
dp
gb
Tellurium
I
hl
hn
hh
nv
d
dp
gb
Iodine
Xe
hl
hn
hh
nv
d
dp
gb
Xenon
Cs
hl
hn
hh
nv
d
dp
gb
Caesium
Ba
hl
hn
hh
nv
d
dp
gb
Barium
La
hl
hn
hh
nv
d
dp
gb
Lanthanum
Ce
hl
hn
hh
nv
d
dp
gb
Cerium
Pr
hl
hn
hh
nv
d
dp
gb
Praseo- dymium
Nd
hl
hn
hh
nv
d
dp
gb
Neodymium
Pm
hl
hn
hh
nv
d
dp
gb
Promethium
Sm
hl
hn
hh
nv
d
dp
gb
Samarium
Eu
hl
hn
hh
nv
d
dp
gb
Europium
Gd
hl
hn
hh
nv
d
dp
gb
Gadolinium
Tb
hl
hn
hh
nv
d
dp
gb
Terbium
Dy
hl
hn
hh
nv
d
dp
gb
Dysprosium
Ho
hl
hn
hh
nv
d
dp
gb
Holmium
Er
hl
hn
hh
nv
d
dp
gb
Erbium
Tm
hl
hn
hh
nv
d
dp
gb
Thulium
Yb
hl
hn
hh
nv
d
dp
gb
Ytterbium
Lu
hl
hn
hh
nv
d
dp
gb
Lutetium
Hf
hl
hn
hh
nv
d
dp
gb
Hafnium
Ta
hl
hn
hh
nv
d
dp
gb
Tantalum
W
hl
hn
hh
nv
d
dp
gb
Wolfram
Re
hl
hn
hh
nv
d
dp
gb
Rhenium
Os
hl
hn
hh
nv
d
dp
gb
Osmium
Ir
hl
hn
hh
nv
d
dp
gb
Iridium
Pt
hl
hn
hh
nv
d
dp
gb
Platinum
Au
hl
hn
hh
nv
d
dp
gb
Gold
Hg
hl
hn
hh
nv
d
dp
gb
Mercury
Tl
hl
hn
hh
nv
d
dp
gb
Thallium
Pb
hl
hn
hh
nv
d
dp
gb
Lead
Bi
hl
hn
hh
nv
d
dp
gb
Bismuth
Po
hl
hn
hh
nv
d
dp
gb
Polonium
At
hl
hn
hh
nv
d
dp
gb
Astatine
Rn
hl
hn
hh
nv
d
dp
gb
Radon
Fr
Francium
Ra
Radium
Ac
Actinium
Th
Thorium
Pa
Protactinium
U
Uranium
Np
Neptunium
Pu
Plutonium
Am
Americium
Cm
Curium
Bk
Berkelium
Cf
Californium
Es
Einsteinium
Fm
Fermium
Md
Mendelevium
No
Nobelium
Lr
Lawrencium
Rf
Ruther- fordium
Db
Dubnium
Sg
Seaborgium
Bh
Bohrium
Hs
Hassium
Mt
Meitnerium
Ds
Darm- stadtium
Rg
Roent- genium
Cn
Coper- nicium
Nh
Nihonium
Fl
Flerovium
Mc
Moscovium
Lv
Livermorium
Ts
Tennessine
Og
Oganesson