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Physical Science
Chapter 17
Question/Term | Answer/Definition |
---|---|
Sum of Protons and Neutrons in the nucleus | Mass number. |
Region where Electrons are found | Electron cloud. |
Vertical Columns of Periodic Table | Group. |
Weighted Average Mass of he Mixture of its Isotopes | Average atomic mass. |
Represents Electrons in Outer Energy Level of an Element | Electron dot diagram. |
Atoms of same Elements but different numbers of Neutrons | Isotopes. |
Number of Protons in an Atom's Nucleus | Atomic number. |
Horizontal Row in the Periodic Table | Period. |
Smallest known Particles that makes up Protons and Neutrons | Quark. |
Developed an Early Periodic Chart | Dmitri Mendeleev. |
Mass of an Atomic Mass Unit | 1.67 X 10^-24g. |
Elements on Left Side of Periodic Table | Metals. |
Elements between Groups 4-7 | Transition Elements. |