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Martha Romero
Week 2 Assinment 2
| Question | Answer |
|---|---|
| Which of the following is not a subatomic particle? | Radon |
| Ionic bonds are chemical bonds formed by the: | transfer of electrons from one atom to another. |
| The atomic number tells you the | number of protons in the nucleus. |
| A chemical bond formed by the sharing of one or more pairs of electrons between the outer shells of two atoms is called a(n) _____ bond. | covalent |
| Acids, bases, and salts belong to a large group of compounds called | electrolytes. |
| An element that contains the same number of protons but different numbers of neutrons is called a(n) | isotope. |
| Acids | release hydrogen ions. |
| Hydrogen bonds result from unequal charge distribution on a molecule. Such molecules are said to be | polar. |
| The element oxygen has an atomic number of 8, which means it contains: | eight protons. |
| Chemical bonds formed by the sharing of electrons are called: | covalent. |
| As a result of which reaction during catabolism is a water molecule added to break a larger compound into smaller subunits? Correct! | hydrolysis |
| Salts | a.can form as the result of a chemical reaction between acids and bases. b. are electrolytes. c. will form crystals if the water is removed. d. will form crystals if the water is removed. |
| Electrolytes are: | called cations if they have a positive charge. |
| An atom can be described as chemically inert if its outermost electron shell contains _____ electrons. | eight and two |
| Which subatomic particles carry a charge? | Protons and electrons |
| The total number of electrons in a neutral atom equals the number of: | protons in its nucleus. |
| A molecule that is polar: | can form a hydrogen bond and has an unequal charge. |
| A weak acid: Correct! | dissociates very little in solutio |
| For sodium to transform from a neutral atom to a positive ion, it must: | lose an electron. |
| Hydrolysis _____ a water molecule. | breaks down compounds by adding |
| Atoms with fewer than eight electrons in the outer energy level will attempt to lose, gain, or share electrons with other atoms to achieve stability. This tendency is called the | octet rule |
| Which type of chemical reaction results in the breakdown of a complex substance into two or more simpler substances? | decomposition reaction |
| A force holding two atoms together is a(n) | chemical bond. |
| The type of chemical reaction most likely to require energy is a(n) _____ reaction. | decomposition |
| The most abundant element essential to life is | carbon. |
| A substance that cannot be broken down or decomposed into two or more different substances is called a(n) | element. |
| What decomposition reaction requires the addition of a water molecule to break a bond? | hydrolysis |
| The water molecule has two distinct ends, each with a partial electrical charge. Because of this structure, water is said to be | polar. |
| As the concentration of hydroxide ions (OH–) increases, the: | solution becomes more basic. and pH rises. |
| What term is used to describe all of the chemical reactions that occur in body cells? | metabolism |
Created by:
Louie123
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