Elements
What is the name for the element O?
Oxygen
2
Give an example of a covalent bond.
H2O (May vary)
What is a chemical structure?
The arrangement of atoms in a substance
What is a valence electron
an negatively charged electron in the outer shell.
What is the name for the element Cl?
Chlorine
How many atoms of each are in H2O2
2 hydrogen and 2 oxygen
Give an example of an Ionic Bond
NaCl (May vary)
What is a chemical bond?
The attractive force that holds atoms together
When does an atom become a negative ion?
When it gains an electron.
What is the name for the element K?
Potassium
What can be learned form looking at a model of a compound?
What is a covalent bond?
a bond formed when atoms share one or more pairs of electrons.
What is a bond length?
The distance between 2 bonded atoms
When does an atom become a cation?
When it loses an electron.
What is the name for the element with the symbol Sm?
Samarium
What is a molecular formula?
a chemical formula that shows the number and kinds of atoms in a molecule, but not the arrangement
What is a metallic bond?
a bond formed by the attraction between positively charged metal ions and the electrons around them.
What is a bond angle?
The angle formed by 2 bonds to the same atom
Draw an electron dot diagram for Carbon.
.
.C.
.
What is the name for the Element Sn.
Tin
What is an empirical formula?
the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio.
What is an Ionic Bond?
a bond formed by the attraction between oppositely charged ions.
Why does a marshmallow have a lower melting point than a sword?
Marshmallow is all nonmetals with long bond lengths, long bonds are weak bonds.
Swords are made of metals with short bond lengths, short bonds are strong bonds.
Compare the metallic bonds of copper to an ionic bond in table salt, why are metals used in electrical wiring?
Metallic bonds are short and strong bonds.
Ionic bonds have nonmetals in the structure which leads to long bond lengths and weaker bonds.
Metals can be shaped, bent, stretched.