Across
- 3. this element has atomic number 2 in periodic table
- 6. chemical formula of ethen / Ethylene
Down
- 1. chemical symbol of iron
- 2. chemical symbol of gold
- 3. formula/symbol of sulphuric acid / oil of vitriol
- 4. this element has atomic number 3 in periodic table
- 5. formula/symbol of muriatic acid
- 7. formula of nitric acid / aqua fortis