The Periodic Table and its Terms
Across
- 2. the vertical column on the periodic table
- 3. how many electrons does carbon have
- 7. the smallest unit of matter that forms elements
- 9. pt is the chemical symbol for ___
- 14. what number is aluminium on the periodic table
- 15. discovered the neutron
- 17. what number is neon on the periodic table
- 21. developed the idea of atoms
- 24. a collection of protons and is always in the centre of the atom
- 25. re is the chemical symbol for ___
- 26. what does the formula H2O belong to
- 27. what number is chlorine on the periodic table
- 30. how many groups are there
- 32. a subatomic particle with a neutral charge and a mass higher than a proton
- 33. a group in the periodic table consisting of five chemically related elements
- 34. what number is zirconium on the periodic table
- 36. what is hydrogen’s atomic number
- 37. a material made up of two or more different substances combined physically but not chemically
- 39. the horizontal columns on the periodic table
- 40. how many neutrons does beryllium have
Down
- 1. a type of matter with uniform properties
- 4. a group of atoms bonded together to make up an element
- 5. contains more electrons than protons and therefore has a negative charge
- 6. created the gold foil experiment
- 8. a substance that can be broken down into another substance
- 10. what number is helium on the periodic table
- 11. what is sodium’s chemical symbol
- 12. created the first periodic table
- 13. a molecule that consists of two or more elements chemically bonded
- 16. an atom can be considered the smallest unit of an element that retains the ___ of that element
- 18. contains more protons than electrons and therefore has a positive charge
- 19. discovered the electron
- 20. rf is the chemical symbol for ___
- 22. an atom or molecule with a net electrical charge
- 23. an orbit followed by electrons around the atom’s nucleus
- 28. what group is argon found in
- 29. mendeleev’s periodic table was published in which century
- 31. b is the chemical symbol for ___
- 35. how many protons does lithium have
- 38. th is the chemical symbol for ___