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Chapter 19 Review
Physical Science
Question/Term | Answer/Definition |
---|---|
Alkaline Earth Metals | Elements in Group 2. |
Alkali Metals | Elements in Group 1. |
Diatomic Molecule | Consists of two atoms of the same element. |
Allotrope | Different forms of same element but with different molecular structures. |
Noble Gases | Elements in Group 18, all are stable because they have a full outer energy level. Do not form compounds because they are isolated atoms and do not react the same. |
Synthetic | Not naturally occurring. |
Halogens | Elements in Group 17. |
Transuranium Elements | Elements that have more than 92 protons. |
Radioactive Elements | Elements that give off particles and energy. |
Semiconductors | Substances that conduct electricity under certain conditions. |
Transition Elements | Elements in Groups 3-12. |
Metals | Elements that have luster, are good conductors, and solids at room temperature. |
Nonmetals | Elements that are gases or brittle solids at room temperature, not good conductors, not shiny. |
Metalloids | Elements having properties of metals and nonmetals. |
Metallic Bonding | Positively charged metallic ions surrounded by electrons. |
Boron Group | Elements in Group 13. |
Carbon Group | Elements in Group 14. |
Nitrogen Group | Elements in Group 15. |
Oxygen Group | Elements in Group 17. |
Inner Transition Elements | Lanthanides and Actinides. |
Salts | Formed when halogens combine with metals. |