Chapter 13 chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what is chemical bonding | the joining of atoms to form a new substance
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| what is a chemical bond | a bond that forms when 2 atoms join
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| how do chemical bonds form | when electrons in atoms react
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| what can happen to electrons in an atom when a chemical bond forms | they can be shaared, lost, or gained
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| where are electrons found | outside the nucleus in layers called energy levels
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| how many electrons can the first energy level hold | 2
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| how many electrons can the second and third energy levels hold | 8
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| do all electrons in an atom interact to form bonds | no, only valence electrons
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| what is a valence electron | an electron in the outermost enegry level
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| what determines what kinds of bonds an atom can form | how many valence elctrons it has
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| what is an atomic number | tells you how many protons and electrons are in an atom of an element
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| do any elements have the same number of protons | no
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| what does the number of protons in an atom equal | number of electrons
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| if atom's atomic number is 14, how many valence electrons are in the 3rd level | 4
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| when is an atom most stable | when the outer energy level is full
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| why do atoms bond with one another | to fill the outer energy level
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| what are ionic bonds | bonds that form when valence electrons are transferred from 1 atom to the other
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| when is an atom most stable | when the outer energy level is full
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| why do atoms bond with one another | to fill the outer energy level
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| what are ionic bonds | bonds that form when valence electrons are transferred from 1 atom to the other
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| what kind of charge does an electron have | negative
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| what kind of charge do protns have | positive
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| when is an atom neutral | when the protons and electrons are equal
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| what is an ion | a charged particle when the protons and electrons aren't even
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| how does an ion become positive | when an atom loses electrons
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| what is needed for the attraction between the electron and the proton to be broken | energy
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| what makes an ion become positive | the forming of negative ions during ionic bonds
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| why is it easier to for nonmetals to gain electrons | they have a fuller outermost energy level
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| what does the name of a negative ion formed from an element end in | -ide
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| when does an atom release more energy | when it can easily gain electrons
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| what are the elements in group 17 | halogens
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| what does a halogen atom give off when it gains an electron | lots of energy
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| why do ionic bonds form | positive ions are attracted to negative ions
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| why is the compound that ions form neutral when the ions themselves are charged | charges of 2 ions cancel out
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| what is a crystal | a hard solid with flat faces and straight edges
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| what is a crystal lattice | a repeating three-dimensional pattern of positive and negative ions
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| what are covalent bonds | a bond that forms when atoms share electrons
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| what do covalent bonds form from | atoms of nonmetals
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| how do electrons behave in covalent bonds | they move between the two atoms
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| what are molecules | atoms that join with each other by covalent bonds
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| what are most molecules made of | atoms of 2 or more elements
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| what is the smallest piece of a covalent compound | a molecule
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| what is a diatomic molecule | a molecule made up of only 2 bonded elements
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| what is a diatomic element | when the two bonded elements are the same element
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| in a diatomic molecule, what are each of the shared electrons counted as | valence electrons
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| what determines howe many covalent bonds a molecule has | the number of shared pairs of electrons
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| how many valence electrons does carbon have | 4
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| what is a metallic bond | bond formed by the attraction between positively charged metal ions and the electrons around the ions
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| what can valence lectrons do in a metallic bond | they can move throughout the metal
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| why can a wire conduct an electric current when it is connected to an electrical source | the valence electrons are free to move throughout the wire
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| why does metal not break no matter how the shape is altered | atoms can be rearranged because electrons move around freely, the valence electrons are constantly moving around the metal ions, and the movement maintains the metallic bond
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| what is ductility | the ability to be shaped into long, thin wires
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| what is malleability | the ability to be hammered into thin sheets
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Created by:
jeremyb
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