Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Water/ BC/ Acid
Basic Chemistry
| Question | Answer |
|---|---|
| atomic number | number of protons in the nucleus |
| atomic mass | number of protons plus number of neutrons |
| electrons fill first shell | 2 |
| electrons fill second shell | 8 |
| electrons fill third shell | 8 |
| element | a substance that cannot be broken down to other substances |
| compound | two or more elements in a fixed ratio |
| atom | smallest unit of matter that retains the properties of an element |
| isotope | two atoms of the same element that have a different number of neutrons. Radioactive |
| solute | in a solution dissolved in the solvent |
| solvent | in a solution fluid that dissolves the soluteq |
| Na | p=11 n=12 |
| Mg | p=12 n=12 |
| Al | p=13 n=14 |
| P | p=15 n=16 |
| S | p=16 n=16 |
| Cl | p=17 n=18 |
| K | p=19 n=20 |
| Ca | p=20 n=20 |
| cohesion | holding together of like substances-- like substances attach |
| adhesion | holding together of different substances-- different substances attach |
| surface tension | water attaches to itself with hydrogen bonds and forms a skin on the surface that can support small objects that are heavier than water |
| why does a metal paperclip float on water? | because of surface tension |
| why does water climb up a papertowel? | because of capillary action |
| acid | pH value below 7 |
| base | pH value above 7 |
| how can an acid harm a protein (enzyme)? | they disrupt the makeup of protein molecules used for structure and chemical reactions |
| why do water and oil not mix? | because water more attracted to itself than oil (cohesion) |
| why does water slide around on wax paper and stick to brown paper? | because wax paper is waterproof |
| why is water a polar molecule? | because it has a negative charge at one end (oxygen end) and a positive charge at the other (hydrogen end) |
| why does water have polar covalent bonds? | because electrons spend more time near the oxygen atom than the hydrogen atom |
| what is a hydrogen bond? | weak bonds water can form with itself |
| why will some substances dissolve in water and others not? | substances will only dissolve in water if they have a charge (can be positive or negative) |
| what is the molecular makeup of water? | water is a polar covalent bond that is slightly negatively charged on the oxygen end and is slightly positively charged on the hydrogen end. |
| describe the ionic bond between sodium and chlorine | sodium gives an electron to chlorine making them both stable. |
| ion | charged atom |
Created by:
edenbreslauer
Popular Biology sets