Index
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Vzácné plyny - urči značku
Matching exercise
Match the items on the right to the items on the left.
Check
Helium
???
He
Kr
Xe
Ar
Ne
Rn
Neon
???
He
Kr
Xe
Ar
Ne
Rn
Argon
???
He
Kr
Xe
Ar
Ne
Rn
Krypton
???
He
Kr
Xe
Ar
Ne
Rn
Xenon
???
He
Kr
Xe
Ar
Ne
Rn
Radon
???
He
Kr
Xe
Ar
Ne
Rn
Check
OK
Index
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