| Question | Answer |
|---|---|
| Protons and neutrons are in the _______ of the atom. | nucleus |
| Anything that has mass and takes up space. | matter |
| A mixture in which two or more substances are evenly mixed but not bonded together. | homogeneous mixture |
| 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 |
| 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 that are chemically joined in a specific combination. | compound |
| Granite | HE |
| Smoke | HE |
| Soda | HO |
| Brass | HO |
| Trail mix | HE |
| Air | HO |
| Tap water | HO |
| Positively charged particle in the nucleus of an atom. | proton |
| Region surrounding an atom's 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. | isotope |
| Region at the center of an atom that contains most of the mass of an atom. | nucleus |
| An atom that has a charge because it has gained or lost electrons. | ion |
| The number of protons in the nucleus of an atom of an element. | atomic number |
| Uncharged particle in the nucleus of an atom. | neutron |
| Which particle in an atom has a positive charge? | proton |
| Which particle in an atom has no charge? | neutron |
| Which particle in an atom has a negative charge? | electron |
| Where is the most of the mass of an atom found? | nucleus |
