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Vocab 2.1-2.2
vocab
Term | Definition |
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atom | a small partical that is the building block of matter |
compound | a substance made of two or more elelments that are chemically joined in specific combination |
element | a substance made of only one kind of atom |
hetergeneouse | a mic=xture in which the substance mad of only evenly mixed |
homogeneous | a mixture in which the substance are evenly mixed but not bonded together |
matter | anything that has mass and takes up space |
mixture | matter that can vary in composition |
molecule | two or more atoms that are held together by chemically bonded and acts as a unit |
substance | matter with a composition that is always the same |
atom number | the number of protons in the nucleus of an atom or element |
electron | a negtively charged partical that occupies the space in an atom outside the nucleus |
electron cloud | the region surronding an atom nucleus where one or more eletrons are mostly likely to be found |
ion | an atom that has a charge because it has a chance because it gained or lost eletrons |
isotope | one of two or more atoms of an element having the same number of protons but differnet number of neotrons |
nucleus | the region at the center of an atom that contains most mass of the atom |
proton | a positivly charge particle in the nucleus of an atom |
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