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| 10505863816 | central elements in our body | oxygen, nitrogen, carbon, hydrogen | 0 | |
| 10505895988 | trace elements | required in only minute quantities e.g. iodine | 1 | |
| 10505900442 | essential elements | needed by an organism to live a healthy life | 2 | |
| 10505904985 | how is each element unique? | different number of protons | 3 | |
| 10505906667 | atomic mass | number of protons & neutrons |  | 4 |
| 10505908561 | atomic number | number of protons |  | 5 |
| 10505910562 | mass number | number of one isotope |  | 6 |
| 10505916639 | elements in the same column... | ...have the same number of neutrons | 7 | |
| 10505922138 | carbon has 6 neutrons and 6 protons. what is its atomic mass and atomic number? | atomic mass - 12 atomic number - 6 | 8 | |
| 10505923646 | what happens when electrons gain energy? | they jump to higher energy levels | 9 | |
| 10505926513 | max number of electrons in a single orbital? | 2 | 10 | |
| 10505926514 | ionic bond | gives away electrons | 11 | |
| 10505928311 | covalent bond | shares electrons strongest bonds | 12 | |
| 10505931885 | polar bonds | one atom is more electronegative, and the atoms do not share the electron equally | 13 | |
| 10505939807 | nonpolar bonds | atoms share the electron equally | 14 | |
| 10505944138 | electronegativity | measure of the ability of an atom in a chemical compound to attract electrons | 15 | |
| 10505945446 | know electron dot configuration/electron pairing | know electron dot configuration/electron pairing |  | 16 |
| 10505951118 | chemical equilibrium | is reached when the forward and reverse reaction rates are equal | 17 | |
| 10505955513 | what connects water molecules? | hydrogen bonds | 18 | |
| 10505958783 | what makes an acid weak? | weak acids don't completely ionize | 19 | |
| 10505959522 | buffer | substances that minimize changes in concentrations of H+ and OH- in a solution | 20 | |
| 10505970529 | acid | any substance that increases the H+ Concentration of a solution |  | 21 |
| 10505974566 | base | any substance that reduces the H+ concentration of solution | | 22 |
| 10505985602 | hydrophilic | has an affinity for water | 23 | |
| 10505987291 | hydrophobic | does not have an affinity for water | 24 | |
| 10505997154 | PH SCALE STUFF | PH SCALE STUFF | 25 |
