Campbell Reece biology chapter 2 Flashcards
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| 8100501348 | matter | Anything that has mass and takes up space | 0 | |
| 8100501349 | three physical states of matter | Solid, liquid and gas | 1 | |
| 8100501350 | Elements in human body |  | 2 | |
| 10092014858 | Element | Substance that cannot be broken down to other chemicals by ordinary means. 92 in nature | 3 | |
| 10092014859 | Compound | Substance consisting of 2 or more different substances in a fixed ratio. Most compounds have 2 elements. Compounds in the human body have around 4. | 4 | |
| 10092014860 | 4 elements essential to life | Nitrogen, oxygen, carbon, hydrogen | 5 | |
| 10092014861 | Trace elements | Essential in small amounts. Zinc, iron, iodine, fluorine | 6 | |
| 10092014862 | Iron | Transport oxygen | 7 | |
| 10092014863 | Iodine | Iodine deficiency causes thyroid gland to grow abnormally | 8 | |
| 10092014864 | Fluoride | Reduce tooth decay, but can make bones brittle | 9 | |
| 10092014865 | Atom | Smallest unit of matter that still retains the properties of an element. | 10 | |
| 10110618427 | Subatomic Particles | Proton, Neutron, Electron | 11 | |
| 10110620976 | Proton | Subatomic particle with a positive electrical charge | 12 | |
| 10110631764 | Electron | Subatomic particle with a negative electrical charge | 13 | |
| 10110622812 | Neutron | Subatomic particle that is electrically neutral (has no charge) | 14 | |
| 10110626007 | Nucleus | Atom's central core | 15 | |
| 10110633566 | Atomic number | Number of protons in an atom | 16 | |
| 10110635198 | Mass number | Sum of the number of protons and neutrons. | 17 | |
| 10110642710 | Atomic mass | equal- ish to the mass number (protons + neutrons) | 18 | |
| 10110645364 | Isotopes | same number of protons but different number of neutrons. Behave identically in chemical reactions. | 19 | |
| 10110657980 | Radioactive Isotope | Unstable isotope where radiation from the decaying isotopes is damaging. | 20 | |
| 10110665646 | Use of radioactive isotope in medicine | Used to tag chemicals | 21 | |
| 10110712470 | PET scanner | Used to produce 3D images with areas in the body with high metabolic activity. | 22 | |
| 10110719142 | Dangers of radioactive isotopes | can damage DNA molecules and cause abnormal bonds to form | 23 |