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BioChem
First half of semester
| Question | Answer |
|---|---|
| What is a molecule? | Two or more atoms connected to each other by giving or sharing electrons. |
| Which state of matter expands to fill whatever space it is in? | Gas. |
| What is a chemical property of a substance? | Capacity for making chemical reactions. |
| True or False: Plasma is part of an atom. | False. |
| What happens to the chemical composition of a substance when it's state of matter changes? | Nothing. The chemical composition stays the same whether the substance is a liquid, solid, or gas. |
| True or False: An electron carries a negative charge. | True. |
| What is the correct way to write 0.004700 in scientific notation? | 4.700 x 10-3 |
| Why is chapstick not a particularly accurate measuring device? | To measure something more than one chapstick long, you would have to either stack or guess where one ends and the other begins, neither of which would have high accuracy. |
| What Metric prefix means 1/1000 or 1x10-3 of a standard unit? | milli- |
| What is the correct way to write 0.000325 in scientific notation? | 3.25x10-4 |
| A Doctor's office often calibrates their scales to measure 3kg lower to account for clothing. What measurement error does this produce? | The measurements would be precise, but not accurate. |
| When potassium and fluoride bond, what is the resulting molecule? | KF |
| Which element, in addition to calcium, is important for proper bone development? | (P) phosphorus |
| What is a radioactive isotope? | A form of an element that sheds particles, producing radioactivity. |
| When water is split, two ions form: H+ (called a hydrogen ion) and OH- which is called what? | hydroxide. |
| What happens to hydrogen bonds when liquid water freezes into ice? | The hydrogen bonds become more stable and maintain a consistent length, which is longer than many hydrogen bonds in liquid water. |
| An _____ is an atom that has extra neutrons than the standard form of the element. | isotope. |
| What happens to F, Cl, and Br when they become ions? | They gain an electron. |
| What is the difference between ethylmercury and methylmercury? | Ethylmercury is quickly cleared from the body and therefore is less likely than methylmercury to build up to toxic levels. |
| A ___ meter is 1000 times longer than a meter. | kilo- |
| What charges can Fe take as an ion? | 2+ and 3+ |
| The first law of _____ says that the total amount of energy in the universe is constant. | Thermodynamics. |
| One ____ is the amount of energy required to raise the temperature of 1g of water by 1 C. | calorie. |
| A solid will _____ when it has absorbed enough energy to move from the solid state to the liquid state. | Melt. |
| What is an extremely common substance that has a specific heat much higher than other materials, so it heats more slowly than whatever it is in? | Water. |
| Chemical bonds are a type of _____ energy. | Potential. |
| One _____ is equivalent to 1000 calories. | Calorie |
| Air molecules moving in the wind is an example of what kind of energy? | Kinetic. |
| If someone leaves the door open when it's cold outside, they are letting _____ escape. | Kinetic energy. |
| When a glow stick is activated and starts glowing what kind of reaction has happened? Exothermic or Endothermic? | Exothermic because energy (light) is produced by the reaction. |
| Mercury is a metal that is liquid at room temperature. This means that mercury has a very low _____ temperature. | Melting. |
Created by:
khoelzle87
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