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Grade 8 8.5(A)
describe the structure of atoms, including the masses, electrical charges...
| Term | Definition |
|---|---|
| Atom | the smallest unit of an element that maintains the properties of that element |
| Mass | A measure of how much matter is in an object. |
| Electrical charge | one of the basic properties of the elementary particles of matter giving rise to all electric and magnetic forces and interactions. The two kinds of charge are given negative and positive algebraic signs: measured in coulombs. |
| Proton | is a subatomic particle found in the nucleus of every atom. The particle has a positive electrical charge. |
| Neutron | a subatomic particle that has no charge and that is located in the nucleus of an atom |
| Nucleus | in physical science, an atom's central region, which is made up of protons and neutrons |
| Electron | a subatomic particle that has a negative charge |
| Electron cloud | a region around the nucleus of an atom where electrons are likely to be found |
| Structure of atoms | theoretically consisting of a positively charged nucleus surrounded and neutralized by negatively charged electrons revolving in orbits at varying distances from the nucleus |
| Particle | is a minute fragment or quantity of matter. In the physical sciences, the word is used to describe a small localized object to which can be ascribed several physical or chemical properties such as volume or mass |
| Cloud | a visible collection of particles of water or ice suspended in the air, usually at an elevation above the earth's surface. |
| Charge | is a characteristic of a unit of matter that expresses the extent to which it has more or fewer electrons than protons. |
| Positive charged | having a deficiency of electrons; having a higher electric potential |
| Negative charged | having a surplus of electrons; having a lower electric potential |
| Neutral charged | an atom or collection of atoms that contains neither a positive nor negative charge. |
| Mass number | An integer equal to the sum of the number of protons and neutrons of an atomic nucleus. |
Created by:
sstall
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