Elements and the Periodic Table

13. Mendeleev was the first scientist to arrange elements on the periodic table

31. Synthetic elements are elements with atomic number higher than ____

5. Rutherford was known for his famous___experiment.

19. There are ___groups and ___periods in the modern periodic table.

27. ____, are soft enough and can be cut with a plastic knife

18. Henry Mosley discovered____

8.______discovered neutron.

24. Metals are good ____of heat and electricity.

2. The smallest part of matter is called

26. Rust is an example of ____

25. Ductile is when materials can be___

15. Mendeleev discovered Scandium,Gallium and _____.

12. The total number of protons and neutrons are called___

7._____stated that shells are energy levels.

6. Who discovered protons?

21. The average of all the isotopes is called__

29. Group 3 through Group 12 is called____

9. ____the smallest and lightest sub-atomic particle.

16. Mendeleev's periodic table had___elements.

23. Malleable means___

22. _____is when smaller nuclei combine to make larger nuclei and emits energy.

20.___ and Nuclear fusion keeps a sun glowing.

11. Elements with the same number of protons but different number of neutrons are____

1. Name the scientist who first stated that every compound has elements in a specific ratio.

17. Mendeleev published his periodic table in____

30. ____are all radioactive.

14. Mendeleev included atomic mass and _______of the elements in the periodic table.

4.______ was the first to say atoms had negative particles inside.

32._____ used in the lab to make synthetic elements.

28. Group 1 and ____are never found in pure form in nature.

10. The number of protons in an atom is the ____ of an element.

3. When elements have only ____kind of atoms.