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15 Cards in this Set

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  • Back
The smallest particle of an element that can be identified with that element. Consists of protons and neutrons in a nucleus surrounded my electrons.
Brownian motion:
Random movement observed among microscopic particles suspended in a fluid medium
A chemical substance made of atoms of two or more different elements combined in a fixed proportion
Chemical Formula:
A description that uses numbers and symbols of elements to describe the proportion of elements in a compound or reaction.
A substance made of only one kind of atoms. Examples of elements are carbok, hydrogen, oxygen
Elements in the same column of the periodic table
Two or more atoms of the same or different elements bonded to form a larger particle
Periodic Table:
A chart that lists elements by atomic number and by electron arrangements, so that elements with similar chemical properties can be found in the same column.
A positively charged particle that is one of the two kids on particles found in a nucleus of an atom
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.
The positively charged center of an atom, which contains protons and neutrons and has almost all he mass of the entire atom but only a tiny fraction of the volume.
Atomic Number:
Number of protons in the nucleus of an atom
The principal building block of the nucleus; a neutron or a proton
A form of an element having a particular number of neutrons in the nuclei of its atoms. Different isotopes of a particular element have the same atomic number but different atomic mass numbers.
An atom or groups of atoms bound together with a net electric charge, which is due to the loss or gain of electrons