Download standards - Integrated Science 3

W5 QUIZ KEY
STANDARDS
Word Bank: covalent, atomic structure, conservation, products, matter, reactants, ions, water
CHEM 3: The conservation of atoms in chemical reactions leads to the principle of
(1)CONSERVATION of matter and the ability to calculate the mass of (2)PRODUCTS and
reactants.
CHEM 5: Acids, bases and salts are three classes of compounds that form (3)IONS in (4)WATER
solutions. Students know the observable properties of acids, bases and salt solutions.
VOCAB
Vocab Term
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Chemical equation (E)
Reactant (G)
Conservation of matter (I)
Coefficients (K)
Stochiometry (N)
Mole (O)
Avagadro’s number (P)
Valence electrons (M)
Noble gases (L)
Covalent bond (A)
Ionic bond (C)
Definition
a. type of bond which is sharing electrons, usually between
non-metals
b. type of bond which is sharing electrons, between metals
c. type of bond with transferred electrons, usually between a
metal and non-metal
d. shows the ratios of elements in a compound or molecule
e. describes a chemical reaction, shows the numbers of
products and reactants
f. a mixing of chemicals where bonds are broken and formed,
new molecules are made
g. what is made in a reaction
h. what is reacted in a reaction
i. matter is neither created or destroyed, important in
understanding balancing chemical equations and reactions
j. describes the number of molecules in a chemical equation
k. describes the numbers of atoms of a specific type within a
chemical formula
l. Group 18, inert, includes helium and argon
m. The outermost electrons, determine bonding
n. Fancy science term for balancing chemical equations, used
to calculate masses and numbers of molecules
o. A unit in balancing chemical equations, measures number
of atoms
p. The number of atoms in 1 mole, 6 x 1023
q. The mass of one mole, measured in g/mol
CONCEPTS
Atomic Structure: Write the correct number of subatomic particles.
16. The atomic number of Iron is 26, and the atomic mass is 56. How many neutrons, protons
and electrons in Iron? 26 ELECTRONS, 26 PROTONS, 30 NEUTRONS
Periods and Groups: Using the periodic table, identify the correct element.
17. What element has group 1, period 4? POTASSIUM
Electron Dot Diagrams: Diagram each of the follow, showing the correct number of valence
electrons in the correct arrangement.
.
18. H
..
19. .O.
..
Electrons: Shared or Transferred? Identify whether the electrons are shared or transferred in the
combinations below. Write SHARED or TRANSFERRED.
..
20. K. + .Cl:
TRANSFERRED
..
..
..
21. .S. + .S.
SHARED
..
..
Balancing Chemical Equations: Balance the following chemical equations by writing the correct
numbers, separated by commas.
22. 2 Zn + 1 O2  2 ZnO
(2,1,2)
23. 2 H2 + 1 O2  2 H2O
(2,1,2)
24. 3 Fe + 4 H20  1 Fe3O4 + 4 H2
(3,4,1,4)
Molar Mass: Using the periodic table, calculate the molar mass of the following compounds. Be
sure to include units (g/mol!) and show work for credit!
25. CH4
(C=12, H=1: 12+1x4 = 16 g/mole CH4)
26. Fe2O3
(Fe=55.8, 0=16: 55.8x2+16x3 = 159.6 g/mole Fe2O3)
27. C8H18
(C=12,H=1: 12x8+1x18 = 114 g/mole C8H18)
Molar Mass Calculations: Calculate the following values. Be sure to include units and show
work for credit!
28. If you have 2 moles of water, how many molecules of water do you have?
2 moles x 6x1023 molecules/mole = 12x1023 or 1.2x1024 molecules
29. If you have 1 mole of water, how many atoms do you have?
3 atoms/water molecule x 1 mole water x 6x1023 atoms/mole = 18x1023 or 1.8x1024 atoms
30. If you have 180 grams of water, how many moles do you have?
180 grams water x mole water/18 grams = 10 moles water