Question |
Answer |
a mixture in which two or more substances are evenly mixed but not bonded together |
homogeneous mixture |
anything that has mass and takes up space |
matter |
substance made of only one kind of atom |
element |
a small particle that is the building block of matter |
atom |
substance made of two or more elements hat are chemically joined in a specific combination |
compound |
a mixture in which the substances are not evenly mixed |
heterogeneous mixture |
two or more atoms that are held together by chemical bonds and act as a unit |
molecule |
matter with a composition that is always the same |
substance |
positively charged particle in the nucleus of an atom |
proton |
region surrounding an atoms nucleus where one or more electrons are often found |
electron cloud |
negatively charged particle that occupies the space in an atom outside the nucleus |
electron |
one or more atoms of an element having the same number of protons but a different number of neutrons |
atomic number |
region at the center of atom that contains most of the mass of an atom |
nucleus |
an atom that has a charge because it has gained or lost electrons |
isotope |
the number of protons in the nucleus of an atom of an element |
neutron |