Atoms and Elements Crossword Puzzle

2. able to be hammered or rolled into thin sheets
5. the ability of a substance to transfer heat or electricity
9. a machine that moves atomic nuclei at high speeds to make heavier elements
11. a particle in the nucleus of an atom that has no electric charge
12. the average mass of all the isotopes of an element
14. a chart of elements arranged by increasing atomic number and similar properties
19. elements in groups 3-12 of the periodic table; includes metals like iron, copper, and gold with moderate reactivity
22. element that are typically shiny, malleable, ductile, and good conductors of heat and electricity
24. the number of protons in the nucleus of an atom; identifies the element
25. the sum of the protons and neutrons in the nucleus of an atom

1. a negatively charged particle that moves around the nucleus of an atom
3. the specific region around the nucleus where electrons are likely to be found
4. the process in which two atomic nuclei combine to form a larger nucleus, releasing large amounts of energy
6. the center of an atom that contains protons and neutrons
7. how easily an element combines with other elements and compounds
8. atoms of the same element that have different numbers of neutrons
9. a high-energy state of matter in which atoms lose electrons, creating a mixture of charged particles
10. the gradual wearing away of a metal due to a chemical reaction, often with oxygen
13. one or two letters that represent an element
15. metal elements in group 2 of the periodic table; fairly reactive metals such as magnesium and calcium
16. able to be pulled into thin wires
17. the smallest particles of an element that has the properties of that element
18. a positively charged particle found in the nucleus of an atom
20. elements in group 1 of the periodic table; very reactive metals such as sodium and potassium
21. a horizontal row on the periodic table
23. a vertical column on the periodic table; elements in the same group share similar properties