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Chapter 16 vocab
Terms in this set (15)
The smallest particle of an element that retains the elements properties
The small, positively charged center of the atom
Particles in the nucleus with an electric charge of 1+
Electrically neutral particles in the nucleus; they do not have a charge
Are particles with an electric charge of -1
Scientists have inferred that protons and neutrons are composed of smaller particles called this
The area around the nucleus of an atom where electrons are most likely to be found
The number of protons in an atoms nucleus is equal to this
The _______ ________ of an atom is the sum of the number of protons and the number of neutrons in the nucleus of an atom.
Atoms of the same element that have different numbers of neutrons
Average atomic mass
The ________ _________ ________ of an element is the weighted average mass of all naturally occurring isotopes of an element, measured in atomic mass units (amu), according to their natural abundance
In the modern _______ ______, the elements are arranged by increasing atomic number——not atomic mass——and by periodic changes in physical and chemical properties
The horizontal rows of elements in the periodic table are called _________ and are numbered 1 through 7
The vertical columns in the periodic table are called ________.
Electron dot diagram
Uses the chemical symbol of an element surrounded by dots to represent the number of electrons in the outermost energy level
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