Science

2. the first ever artificially produced element, produced as a by-product at nuclear power stations
4. the group of metals that are shiny, soft, and react violently with water
9. a category of atom on the periodic table
10. where two or more substances bind to create one complex substance
12. the subatomic particles with a positive charge
13. the rarest element ever
15. the inventor of the periodic table, Dmitri Mendeleyev, was from... ?
18. the subatomic particles with a negative charge
19. where electrons flow from atom to atom
20. some elements abbreviations don't make much sense to english speakers because they are the element's name in this language
22. where one or more complex molecule/s breaks down into simpler compounds
23. subcategories of when a atom gains or loses a neutron

1. this country was named after the element of silver's latin name
3. what is a group of interconnected atoms called?
5. the element with the highest weight on the periodic table
6. what is everything in the universe made of?
7. the effect radioactivity has on some less dense materials
8. where two molecules interact with each other and change structure
11. the center of the atom
14. the rarest naturally occurring element on earth
16. the element with the lightest atomic weight on the periodic table
17. the rows on the periodic table are called...?
19. this element is widely regarded as the most versatile elements because of how it is the base element of so many things
21. this element exists naturally in abundance on earth, but it was discovered because of astronomers observing the sun
24. what is left after a reaction occurs