Across
- 2. The space an electron occupies is called an
- 3. What is the seventh element in the periodic table.
- 7. Transition can be hammered into shape without breaking. They are ……
- 9. One of the allotropes of carbon which is used in jewellery
- 11. The elements between the groups 2 and 3 are called the
- 13. This is one of the types of subatomic particle
- 14. A type of bonding where the electrons are shared
- 15. If transition metal ions are present in a solution a coloured solution will be formed when we add…
- 17. This element is used to make nuclear power
- 19. The emission of energy as electromagnetic waves or moving subatomic particles
- 21. What is the common name for CaCO3
- 23. The fourth alkali metal
- 24. Which gas turns limewater milky?
- 25. A type of bonding where electrons are transferred from one atom to another
- 28. Hydrogen burns with a……
- 29. A radioactive isotope used in the treatment of cancer
Down
- 1. Plants can create most of the world’s free oxygen through this process
- 4. This process is used to find the age of dead organisms by comparing the amounts of two isotopes of carbon.
- 5. The time it takes for half of the atoms of a substance to decay
- 6. Elements with the same number or protons and electrons but different numbers of….
- 8. Oxygen and nitrogen can be obtained from liquid air by a process called…
- 10. The ore that pure uranium and pure radium can be obtained from.
- 12. He discovered the electron
- 16. woman discovered radium?
- 18. The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
- 20. What is the flame colour for potassium
- 22. What are the group seven elements called?
- 26. The atoms of halogens are……
- 27. What is the flame colour for copper