Chemistry Crossword

3. A vertical column in the periodic table of the elements. Elements in a group have similar properties.
5. An atom or group of atoms that has a positive or negative electric charge.
6. An element that tends to be shiny, easily shaped, and a good conductor of electricity and heat
8. number The total number of protons in an atom’s nucleus.
10. A negatively charged particle outside an atom's nucleus
13. An atom of one element that has a different number of neutrons than another atom of the same element.
14. The central region of an atom where most of the atom's mass is found in protons and neutrons
15. An element that has both properties of both metals and nonmetals.

1. A table of the elements, arranged by an atomic number that shows the patterns in their properties.
2. A horizontal row in the periodic table of elements. Elements in a period have varying properties.
4. The number of protons found in the nucleus of an atom.
7. The length of time it takes for half of the atoms in a sample of a radioactive element to decay into atoms of another element.
9. A positively charged particle located in an atom's nucleus
11. An element that is not a metal and has properties generally opposite to those of a metal.
12. A particle that has no electric charge