chemistry

3. the most reactive metal
4. brittle, semi conductive, able to be cut with a knife
6. what mendeleev used to organize the periodic table
8. alkali metal with lowest atomic number
9. an atom with a net negative or positive charge due to gaining or losing one or more electrons
13. all are radioactive
16. when valence electrons move from one atom to another permanantly
17. the most reactive nonmetal
18. last name of the scientist that made the periodic table
19. illustration to show valence electrons on paper
20. known for being malleable, highly conductive
21. the top-left most part of the staircase
25. alkaline earth metal that is commonly found in cows milk
26. the electrons that exist in the outermost shell of the atom
28. noble gas with lowest atomic number

1. will not bond with other atoms
2. metals that are not found alone in nature
5. highly reactive element with an atomic number of three
6. negatively charged ion
7. transition metal with an atomic number of seventy six
8. called the high earth metals
10. positively charged ion
11. person who modernized the periodic table
12. largest group in the period table
14. metal known for its orange color and high conductivity, known for commonly being used in wires
15. naturally gaseous, brittle in solid form
22. bonds with chlorine to make salt
23. only lanthanide that is completely radioactive
24. actinide with the highest atomic mass
27. nonmetal with an atomic number of eight