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Anatomy Test 1
Anatomy
| Term | Definition |
|---|---|
| Matter | Anything that has mass and occupies space. |
| Energy | Anything that moves or otherwise acts upon matter; two forms. |
| Kinetic | Energy in motion. |
| Potential | Energy at rest. This includes chemical energy which is stored in the bonds of molecules. |
| Element | The simplest form of matter; cannot be broken down into two or more different substances; represented by chemical symbols. |
| Atom | The smallest structural unit of an element that still retains its chemical and physical properties. |
| Molecule | A substance composed of two or more atoms. |
| Compound | A substance composed of two or more different elements. |
| Nucleus | Dense core containing protons and neutrons. |
| Protons | Positively charged particles. |
| Neutrons | Neutral or non-charged particles. |
| Electrons | Negatively charged particles. |
| Energy levels/Shells | Space around the nucleus containing the electrons which travel in orbitals around the nucleus based on their energy levels. |
| Atomic-number | Number of protons. |
| All atoms of the same element, but no two different elements | Contain the same number of protons. |
| Usually the number of neutrons | Equals the number of protons. |
| Atomic mass | The collective number of protons and neutrons. |
| Isotopes | Atoms of the same element with different atomic weights due to a differing number of neutrons. |
| There can only be up to two electrons in | Each orbital |
| The first shell only has | One orbital |
| The second and third orbitals only have | Four orbitals |