Question | Answer |
Matter | Anything that has mass and takes up space |
Mass | A measure of the amount of matter in an object; a fundamental property of an object that is not effected by the forces that act upon the object |
Element | A substance that cannot be separated or broken down into simpler substances by chemical means; all elements of an element have the same number. |
Atom | The smallest unit of an element that maintains the chemical properties of that element |
Nucleus | The part of the Eukaryota nucleus where ribsomal RNA is synth sized |
Proton | A subatomic particle that has a positive charge and is in the nucleus of an atom; the number of protons in a nucleus determine the identity of an element |
Neutron | A subatomic particle that has no charge and that is located in the nucleus of an atom |
Atomic Number | The number of protons in the nucleus of an atom |
Mass Number | The sum of the protons and neutrons in the nucleus of an atom |
Electron | A subatomic particle with a negative charge |
Orbital | A region in an atom where there is a high probability of finding electrons |
Isotope | An atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons |
Compound | A substance made up of atoms of two or more different elements joined by chemical bonds |
Chemical Bond | The attractive force that holds atoms or ions together |
Covalent Bond | A bond formed when atoms share one or more pairs of electrons |
Molecule | A group of atoms that are help together by chemical forces; a molecule is the smallest unit of matter that can exist by itself and retain all of a substance's chemical properties |
Ion | An atom, radical or molecule that has gained or lost one or more electrons and has a negative or positive charge |
Ionic Bond | The attractive force between oppositely charged ions, which form when electrons are transferred from one atom or another |