Across
- 2. -an element that has properties of both metals and nonmetals
- 5. -any atom or group of atoms that has a positive or negative electric charge
- 10. -the emission of energy in the form of ionizing radiation
- 11. -a particle that surrounds the nucleus, with a negative charge
- 12. -a horizontal row in the periodic table of the elements
- 13. -an element that tends to be shiny and easily shaped
- 14. -the members of the 15 naturally occurring metallic chemical elements
- 16. -An atomic or molecular system having an excess of negative charge
- 17. -any of a group of rare gases
- 20. -the process by which the nucleus of an atom of an element
- 21. -1/12 the mass of a carbon-12 atom
- 22. - A group of electrons circulating around a nucleus
- 23. -the number of protons in the nucleus of an atom
- 25. -a particle found in the nucleus with a positive charge
Down
- 1. - the elements that correspond to group 2 of the modern periodic table
- 3. -Atoms with the same number of protons but different numbers of neutrons
- 4. - If it has more protons than electrons
- 6. - a vertical column in the periodic table
- 7. -the central region of an atom where most of the atom's mass is found in protons and neutrons
- 8. - any of various metallic elements that have valence electrons in two shells instead of only one
- 9. - an element that is not a metal
- 15. -the chemical elements that are present in the 17th group of periodic table
- 18. -any of the series of elements with increasing atomic numbers that begins with actinium or thorium and ends with lawrencium
- 19. -any of the six chemical elements that make up Group 1
- 24. -a particle found in the nucleus with a neutral charge