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Week 2
Chemistry of life
| Question | Answer |
|---|---|
| Substances that accept hydrogen ions are called: | Bases. |
| An example of a catabolic process is: | hydrolysis. |
| Which of the following is not one of the major elements present in the human body? | Zinc |
| Which of the following represents properties of water? | Strong polarity, High heat of vaporization, and High specific heat |
| Atomic mass is determined by the number of: | protons and neutrons. |
| The study of metabolism includes examination of: | ATP requirements, anabolism, and catabolism. |
| The octet rule refers to the: | stability of the atom when there are eight electrons in the outermost energy level. |
| An example of a catabolic process is: | Hydrolysis |
| Which of the following represents a trace element in the body? | Iron |
| The kind of element is determined by the number of: | Protons. |
| Acids: | are proton donors, taste sour, and release hydrogen ions in an aqueous solution. |
| Carbon has an atomic number of 6. The number of electrons found in the first shell is: | Two |
| An example of an element would be: | Ne |
| A solution that contains a greater concentration of hydroxide ions (OH–) than hydrogen ions (H+) is a(n) _____ solution. | alkaline (basic) |
| The study of metabolism includes examination of: | ATP requirements, anabolism, and catabolism. |
| The atomic number of carbon is 6. How many unpaired electrons are in its outer shell? | Four |
| A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain _____ protons, _____ neutrons, and _____ electrons. | 12; 13; 10 |
| Approximately what percentage of the body weight of an adult female is water? | 50% |
| Which of the following elements is least likely to combine with another element? | Helium |
| When atoms combine, they may gain, lose, or share: | Electrons. |
| As the concentration of hydrogen ions (H+) increases, the: | solution becomes more acidic |
| Which of the following bonds are the weakest? | Hydrogen |
| An ionic bond is formed by: | a positive and a negative ion attracting each other. |
| The most abundant and important compound(s) in the body is(are): | water. |
| The hydrogen isotope tritium consists of: | one proton and two neutrons. |
| The type of reaction in which substances are combined to form more complex substances is called a(n) _____ reaction. | synthesis |
| The process of the digestion of food is an example of which type of reaction? | Decomposition |
| The approximate pH of gastric fluid is: | 2 |
| In the presence of a base, red litmus paper will: | turn blue. |
| The formation of sucrose involves the removal of a molecule of water. This is called: | dehydration synthesis. |
| AB + CD → AD + CB is an example of a(n) _____ reaction. | exchange |
| An isotope of an element contains different numbers of ____ from other atoms of the same element. | Neutrons |
| A negatively charged subatomic particle that moves around the nucleus is a(n): | Electron. |