Across
- 2. used in aircraft construction & kitchen utensils. it has a low density compared to other common metals.
- 5. it is used to make transformer plates. it is a metalloid.
- 6. It is used to generate electricity. it has the least amount of electrons.
- 7. it is in most things in one form or another. people are concerned about its emission levels.
- 10. it is used in incandescent light bulbs to stop oxygen from corroding the filament. it is a gas that is colourless odourless and inert to other elements.
- 11. it is used in both fertilisers and explosives. it is the lightest element in group 15.
- 13. It is used in the production of inorganic chemicals, matches and glass. The element is bright yellow and solid at room temperature.
- 14. it is used in the manufacturing of steel. it is needed to breathe.
- 17. it is in toothpaste and drinking water. it is a halogen.
- 18. it explodes in contact with water. it makes up half of the chemical formula for salt.
- 19. it is used to regulate blood pressure. it is an alkaline earth metal.
- 20. It is used to make balloons float. it is a non-flammable gas.
Down
- 1. it is in milk, kale, broccoli and bok choi. It is used for the movement of muscles and helps nerves send messages around the body.
- 3. it helps muscles contract. it is a conductive metal that reacts quickly with oxygen.
- 4. it is used to treat water and bleach paper during the manufacturing process. the element is a yellow-green gas at room temperature.
- 8. It is used in laundry and dish-washing liquids. There are two major forms of this element, red and white.
- 9. It is structural for plant cell walls. it is a metalloid.
- 12. it has two complete shells. The word for this element is derived from the Greek word νέον, the singular form of νέος meaning new.
- 15. It is used to treat some mental illness like bipolar. it is the least dense solid element.
- 16. In its pure form its used in fuel containers and nuclear bombs. the atomic number is 4.