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BIO120-Chem of Life
BC - Chemistry
| Question | Answer |
|---|---|
| This number equals the number of protons in an atom. | Atomic Number |
| Which of the properties of water listed in your notes are due to the polarity of the water molecule? | All of the properties of water. |
| These bonds are formed when electrons are shared. | Covalent Bonds |
| The charge for a neutron. | Neutral - no charge |
| The charge for a proton. | Positive |
| The 2 types of particles found in the core of an atom. | Protons and neutrons |
| Diatomic nitrogen is held together by how many covalent bonds? | triple covalent bond |
| This equals the number of protons plus the number of neutrons in an atom. | Atomic Mass (or Mass Number) |
| These chemical bonds are fomed when one atom gains an electron(s) and the other atom involved loses an electron(s). | Ionic bonds |
| Hydrogen bonds are based upon this type of covalent bond (choose either polar or non-polar). | Polar Covalent Bonds |
| What 3 particles make up an atom? | Protons, Neutrons & Electrons |
| Give an example of a compound formed due to ionic bonding. | NaCl |
| The charge found on an electron. | Negative |
| This equals the number of protons in an atom. | Atomic Number |
| The term used for anything that takes up space and has mass. | Matter |
| A substance that cannot be broken down to other substances by chemical reactions. | Element |
| A molecule consists of two or more atoms held together by covalent bonds. | Molecule |
| The natural elements which are required for life. | Essential elements |
| The natural elements required by an organism in very small amounts. | Trace elements |
| Atoms of the same element have the same number of _______. | Protons |
| Isotopes are two atoms of an element with different numbers of ______. | Neutrons |
| A parent isotope decays into a daughter isotope at a fixed rate known as _____. | the half-life. |
| ______ is defined as the capacity to do work or cause change. | Energy |
| Electrons which occupy the outermost shell of an atom are termed _____. | Valence |
| Chemical ______ are interactions between atoms are generally determined by the valence _______. | Bonds; electrons |
| When atoms share one pair of electrons it forms a _____. | Single covalent bond |
| When atoms share two pairs of electrons it forms a _____. | Double covalent bond |
| Diatomic hydrogen is formed from a _______ covalent bond. | Single |
| Diatomic oxygen is formed from a _______ covalent bond. | Double |
| ______ covalent bonds occur when electrons are shared equally among the atoms. | Non-polar |
| ______ covalent bonds occur when electrons are shared not equally among the atoms. | Polar |
| An atom that has either gained or lost an electron is known as an _______. | Ion |
| An atom that has gained an electron is known as a(n) _______ and is _______ charged. | anion; negatively |
| An atom that has lost an electron is known as a(n) _______ and is _______ charged. | cation; positively |
| The making and breaking of chemical bonds are collectively termed: | chemical reactions |
| The molecules which are evident at the start of a chemical reaction are called: | Reactants |
| The molecules which are evident at the end of a chemical reaction are called: | Products |
| Reactions that proceed in both the direction of reactants and products are called _______. | Reversible |
Created by:
callen-pbsc
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