Difficulty level:
Difficulty:
B2-C2
Theme:
Science
Date:
2026-11-07
Click on an empty cell for your first clue.
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ACROSS
1
copper (metal, element)
5
battery (electric)
7
vacuum (region that contains no matter)
9
reflex (automatic response to a stimulus)
10
extract (substance taken from plant)
12
steam, vapour
13
paradox
16
patent (of a new invention)
17
atomic nucleus
18
bubble
21
stability
22
uranium
23
helium
DOWN
2
fluorine
3
to recharge, to charge up (=to add energy; e.g., to an electric battery)
4
selenium
6
noble metal
8
microscopic (very small)
11
corrosion
14
analysis
15
nuclear weapon, atomic bomb
19
foam
20
acid (chemistry)
ACROSS
1
copper (metal, element)
5
battery (electric)
7
vacuum (region that contains no matter)
9
reflex (automatic response to a stimulus)
10
extract (substance taken from plant)
12
steam, vapour
13
paradox
16
patent (of a new invention)
17
atomic nucleus
18
bubble
21
stability
22
uranium
23
helium
DOWN
2
fluorine
3
to recharge, to charge up (=to add energy; e.g., to an electric battery)
4
selenium
6
noble metal
8
microscopic (very small)
11
corrosion
14
analysis
15
nuclear weapon, atomic bomb
19
foam
20
acid (chemistry)