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Atoms
Atoms and Periodic Table
Question | Answer |
---|---|
Atom | The building block of matter. |
Matter | Anything that takes up space and has mass. |
Proton | The positive part of an atom. |
Electron | The negative part of an atom. |
Neutron | The neutral part of the atom. No charge. |
Nucleus | In the center of an atom. Contains the protons and neutrons. |
Electron shells | Orbits around the nucleus. Contains the electrons. |
Element | Made up of like atoms. |
Periodic Table of Elements | List of all elements that build matter. |
Atomic number | Number of protons and electrons in an atom. The number of the element on the Periodic Table of Elements |
Element symbol | Abbreviation of an element. |
Element name | Name of the element on the Periodic Table of Elements |
Atomic Mass | The number of protons and neutrons in an atom. |
Bohr Model | Model of an atom that shows all the particles in an atom. |
Valance electron | The electrons in the outermost shell of an atom. |
Electrons in 1st and 2nd Shells | 2 in the first; 8 in the second |
Size of electron | Smallest particle in an atom. |
Size of neutron and protons. | About the same size. Bigger than electrons. |
Finding number of neutrons. | Neutrons = atomic mass - atomic number. |
Group | A column going down in a periodic table that has elements with similar physical and chemical properties. |
Period | A row of elements going across in the periodic table. |