science vocab

4. / a compound that consists of only two elements
5. / a shorthand notation used to identify a compound
7. / a chemical bond formed when atoms share electrons
10. / separated by its surface from other forms.
13. / the electrons in the outermost shell, or energy level, of an atom
16. / the number of atoms in a molecule
17. / an atom that has lost electrons, resulting in an overall positive charge
18. / a group of atoms that are joined together with covalent bonds.
19. / whose properties are intermediate between those of metals and solid
20. / an element or substance that is not a metal
21. / the vertical columns

1. /The horizontal rows of the periodic table
2. / Thus, an ionic bond typically occurs between a metal and a nonmetal
3. / column of elements in the periodic table of the chemical elements
5. / The joining together of atoms that results from forces of attraction
6. / Periodic trends, arising from the arrangement of the periodic table, provide chemists with an invaluable tool
8. / a chemical bond formed when atoms gain or lose electrons
9. / an atom that has gained electrons, thereby taking on a negative charge
11. / are classified as belonging to the s- and p-blocks in the periodic table
12. / Periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements
14. / The organization of electrons in energy levels
15. / When atoms from different elements bond in this way, a new substance
19. / a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity