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Chapter 3 Vocab

Jacob Albright's Chapter 3 Vocab

Atom Small dense positive core(nucleus) surrounded by a large space ocupied by electrons.
Plum-Pudding Model A model for the Atom which showed the electrons just floating around everywhere, with no order.
Gold-Foil Experiment This experiment showed that atoms had a negative core, and were not all just empty space. The scattering of alpha particles proved there was more than empty space in atoms.
Orbitals The model for the atom where electrons orbit the protons and neurtons in the center.
Nucleus In the atom, it contains protons and neutrons
Proton Have a positive charge, are located in the nucleus, has a mass of 1 amu, and the number of protons of each atom of an element are the same.
Electron Has a negative charge, is located outside the nucleus, has a mass of 1/1836 of a proton, and is the cloud surounding the nucleus.
Neutron Has a neutral charge, located in the nucleus, has a mass of 1 amu, and is the "Glue" that holds the nucleus together.
Mass Number Sum of protons and neutrons, it is not the Atomic Mass.
Atomic Number The number of protons of any given atom of an element.
Ion Non-neutral atom in which the # of electrons is not equal to the number of protons.
Isotope Atom of the same element which have the same number of protons but different numbers of neutrons.
Atomic Mass The mass of a specific Isotope of a given atom.
Valence Electrons The outermost or furthest away electrons of an atom. They are important in determining how the atom reacts with other atoms.
Octet A rule that staes atoms tend to combine so that they have 8 electrons in their valence shell, giving them the same electronic configuration as a noble gas.
Excited State An elevation in energy level from the baseline energy state
Ionization Energy The Minimal energy required to remove an electron from the atom in its ground electronic state.
Electron Affinity The energy change when an electron is added to the neutral species to form a negative ion.
Electronegativity A chemical property that describes the ability of an atom to attract electrons twards itself.
Created by: jalbright4172