Across
- 4. What makes acids corrosive and acidic?
- 6. There are different kinds of this. All are used to measure the pH value of a solution, e.g. bath water.
- 9. What makes bases corrosive and basic?
- 15. The name of an ion that is + charged
- 17. A substance that has a high proportion of hydroxide ions and a high pH value.
- 18. Element H
- 19. Element Mn
- 21. Element B
- 22. A solution that is neither acidic nor basic.
- 23. A scale that describes whether a substance is acidic or basic.
- 24. Called the bond between positive and negative ions in an ionic compound.
- 25. A chemical compound in which at least two atoms are joined together, can be different or the same elements.
- 26. Element N
Down
- 1. Is like an atom but lacks or has more electrons. Has a negative or positive charge.
- 2. Element Fe
- 3. Rows in the periodic table.
- 5. Element C
- 7. A substance that has a high proportion of hydrogen ions and a low pH value.
- 8. Truth or false. A pH value of 7 is considered neutral. Water is an example of such a substance.
- 10. A chemical compound formed when negative and positive ions are attracted to each other.
- 11. Columns in the periodic table.
- 12. Different types of atoms are combined in a compound and form e.g. water
- 13. When a substance reacts with another substance and forms new properties, form and character.
- 14. Element Li
- 16. The name of an ion with - charged
- 20. Truth or false. A base can be as dangerous and corrosive as an acid.