Vocab

Across

3. electrons in the outermost shell, or energy level, of an atom.
5. a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the f-block columns (between groups 3 and 4) are not numbered.
9. a compound that consists of only two elements
10. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
11. a positively charged ion.
12. table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.
14. a chemical bond formed when atoms share electrons
17. a physically distinctive form of matter, such as a solid, liquid, gas, or plasma
19. the total number of protons and neutrons in a nucleus.
20. one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical chemical behavior but with different atomic masses and physical properties.
23. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
25. The joining together of atoms that results from forces of attraction
26. an element that readily forms positive ions and has metallic bonds
27. a column of elements in the periodic table of the chemical elements
29. an atom that has lost electrons, resulting in an overall positive charge.
31. a group of atoms that are joined together with covalent bonds
35. the elements in groups 14-16 of the periodic table, not able to conduct electricity or heat very well, very brittle, and cannot be rolled into wires or pounded into sheets.

Down

1. a compound that consists of only two elements: a metal and a nonmetal it forms when electrons are transferred from one atom to the other, causing the atoms to develop opposite charges.
2. The organization of electrons in energy levels
4. the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table
6. a shorthand notation used to identify a compound
7. a negatively charged ion.
8. specific patterns in the properties of chemical elements that are revealed in the periodic table of elements
13. the basic units of matter and the defining structure of elements.
15. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
16. the system of electrons surrounding the nucleus of an atom.
18. in a chemical formula is a small number placed below the Baseline that tells how many atoms of an element are in each molecule or compound
21. a pure substance composed of two or more elements that are chemically combined in a fixed portion
22. a row of chemical elements
24. an atom that has gained electrons, thereby taking on a negative charge.
28. a chemical bond formed when atoms gain or lose electrons
30. the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
31. an imprecise term used to describe a chemical element that forms a simple substance having properties intermediate between those of a typical metal and a typical nonmetal.
32. the mass of an atom of a chemical element expressed in atomic mass units. It i approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
33. a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
34. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.