The Periodic Table

4. a subatomic particle, whose electric charge is negative one elementary charge.
9. chart that arranges the chemical elements in a useful, logical manner.
10. a Russian chemist and inventor. He is best remembered for formulating the Periodic Law and creating a farsighted version of the periodic table of elements.
12. Aka semimetals--What class of element is Boron(B),Tellurium(Te), or Carbon(C) from?
13. a subatomic particle, symbol p or p⁺ , with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron.
14. What class of element is Chlorine(Cl), sulfur(S), or Nitrogen(N) from?

1. two ways of categorizing elements in the periodic table. Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.
2. a process in which one or more substances, the reactants, are converted to one or more different substances, the products.
3. a substance that contains two or more elements chemically combined in a fixed proportion.
5. a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
6. short notation derived from the scientific name of a chemical element
7. a subatomic particle, symbol n or n⁰ , which has a neutral charge, and a mass slightly greater than that of a proton.
8. What class of element is Iron(Fe),Copper(Cu), or Sodium(Na) from?
11. the number of groups in a periodic table
15. the number of periods in the periodic table