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Bader Chap. 17 Vocab
Chapter 17: The Atomic Nature of Matter
Question | Answer |
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The smallest particle of an element that can be identified with that element. Consists of protons and neutrons in a nucleus surrounded by electrons. | Atoms |
A substance made of only one type of atom. Examples are carbon, hydrogen, oxygen, and nitrogen. | Element |
The perpetual random movement of microscopic particles suspended in a fluid medium. | Brownian Motion |
The smallest particle of substance consisting of two or more atoms of the same or different elements bonded together. | Molecule |
A chemical substance made of atoms of two r more different elements combined in a fixed proportion. | Compound |
A description that uses numbers and symbols of elements to describe the proportions of elements in a compound or reaction. | Chemical Formula |
The positively charged center of an atom, which contains protons and neutrons and has almost all the mass of the entire atom but only a tiny fraction of the volume. | Nucleus |
The principle building block of the nucleus; a neutron or a proton. | Nucleons |
An electrically neutral particle that is one of the two kinds of particles found in the nucleus of an atom. | Neutrons |
A positively charged particle that is one of the two kinds of particles found in the nucleus of an atom. | Protons |
A form of an element having a particular number of neutrons in the nuclei of its atoms. Different types of a particular element have the same atomic number but different atomic mass numbers. | Isotopes |
Number of protons in the nucleus of an atom. | Atomic Number |
An atom (or group of atoms bound together) with a net electric charge, which is due to the loss or gain of electrons. | Ion |
A model in which the electrons of an atom are picture as grouped in concentric shells around the nucleus. | Shell Model of the Atom |
A chart that lists the elements by atomic number and by electron arrangements, so that elements with similar chemical properties are in the same column. | Periodic Table |
A fourth phase of matter, in addition to solid, liquid, and gas. In the plasma phase, which exists mainly at high temperature, matter consists of positively charged ions and free electrons. | Plasma |