Worksheets😎 Final Exam - Concepts & Calculations
Total questions: 47
Worksheet time: 24mins
Name
Class
Date
1.
If a laboratory fire erupts, what should you do FIRST?
a)
Tell the teacher
b)
Jump out the window
c)
Grab the fire blanket
d)
2.
Create a word using the element code.
- group 1, period 2: ____
- group 16, period 2: ____
- group 15, period 2: ____
- group 16, period 3: ____
(a)
3.
What is the number of protons in Xenon (Xe)?
(a)
4.
Protons determine _______________ of an element.
a)
Average Atomic mass
b)
Weight
c)
Identity
d)
AMUs
5.
What does a subscript (small number below the line of text) tell you?
a)
The charge
b)
The number of atoms of that element
c)
How much it weighs
6.
How many Hydrogens are in C₆H₁₂O₆?
(a)
7.
What is an isotope?
a)
An atom with a different number of neutrons
b)
An atoms with a different number of electrons
c)
An atom with a different number of protons
8.
What is an ion?
a)
An atom with a different number of neutrons
b)
An atoms with a different number of electrons
c)
An atom with a different number of protons
9.
How many electrons would be in Bromine (Br) with a -3 charge?
a)
35
b)
32
c)
38
d)
-3
10.
What would the mass of a Carbon isotope with 12 neutrons? (include amu as your units)
(a)
11.
How many neutrons would be in: Phosphorus--35
a)
35
b)
15
c)
20
d)
30.97
12.
How many electrons would Mg +2 have?
a)
12
b)
10
c)
14
d)
2
13.
Is Al +3 a cation or an anion?
a)
anion
b)
cation
c)
neither
14.
How many neutrons would the problem for Aluminum have?
a)
11
b)
24
c)
13
d)
12
15.
What is the mass of Mg?
a)
2
b)
22
c)
12
d)
24.305
16.
What is the electron configuration for Fe?
a)
1s2 2s2 2p6 3s2 3p6 4s2 3d6
b)
[Ar] 4s² 3d¹⁰ 4p⁵
c)
[Ar] 3d¹⁰ 4s²
d)
1s2 2s2 3p6 3d10
17.
Select the orbital energy diagram of Oxygen:
a)
Option 1
b)
Option 2
c)
Option 3
18.
Draw the Bohr Model for Fluorine
a)
Option 1
b)
Option 2
19.
Draw the Lewis Dot Structure for Cl
a)
Option 1
b)
Option 2
c)
Option 3
20.
Name LiF
a)
Lithium monofluoride
b)
Lithium Fluoride
c)
Monolithium monofluoride
21.
Name C₂Br₅
a)
Dicarbon pentabromide
b)
Carbon (V) Bromine₂
c)
Carbon Bromide
22.
Write formula: Hexasulfur Dichloride
a)
S6Cl2
b)
S2Cl6
c)
SCl
23.
Write formula: Iron (IV) Oxide
a)
FeO2
b)
Fe4O2
c)
Fe2O4
24.
What is wrong with the following image of H₂O? (Select all that apply.)
a)
It is correct
b)
Incorrect magic number (number of paired electrons)
c)
Center element is incorrect
25.
What is wrong with the following image of H₂? (Select all that apply.)
a)
It is correct
b)
Incorrect number of valence electrons
c)
Incorrect magic number (number of paired electrons)
26.
What is wrong with the following image of HCl? (Select all that apply.)
a)
It is correct
b)
Incorrect number of valence electrons
c)
Incorrect magic number (number of paired electrons)
27.
How many valence electrons does Oxygen have?
(a)
28.
What is the total number of valence electrons for O2?
a)
12
b)
10
c)
11
d)
6
29.
How is the magic number calculated?
a)
The magic number is the same thing as valence electrons.
b)
Valence electrons divided by 2 gives the magic number.
30.
What is the magic number (number of electron pairs) for O₂?
(a)
31.
For O₂, which of the following best describes the bond between the two O's?
a)
Single
b)
Double
c)
Triple
32.
For O2, what is the number of bonds and the number of lone pairs?
a)
2 bonded and 1 lone pair
b)
2 bonded and 4 lone pairs
c)
3 bonded and 1 lone pairs
d)
4 bonded and 0 lone pairs
33.
Describe the bond between carbon and hydrogen.
a)
Polar: C-H +---------->
b)
Polar: C-H <------------+
c)
Nonpolar
34.
Which rule(s) explains the number of sig figs in 0.070020?
a)
Zeros between non-zeros are always significant.
b)
Non-zero digits are always significant.
c)
Leading zeros are not significant.
d)
Trailing zeros are significant only when a decimal is present.
35.
How many significant figures are in 0.0007406?
(a)
36.
Convert 4.6x10³ to standard notation. (Write the normal number)
(a)
37.
Convert 68 into scientific notation.
a)
6.8x10¹
b)
6.8x10⁻¹
c)
6800
38.
Convert 9000 mL to L
a)
9x10⁻³ L
b)
9 L
c)
9x10³ L
d)
9.000 x10⁻³ L
39.
What is bigger, a nm or a cm?
(a)
40.
Numbers in dimensional analysis require what?
a)
UNITS
b)
no units
41.
How would you set up the following problem: Convert 9.87x10²⁰ molecules of H₂ to moles.
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
42.
Convert 9.87x10²⁰ molecules of H₂ to moles.
a)
1.64x10⁻³ mol
b)
1.64x10³ mol
c)
4.81x10²⁴ molecule
d)
4.81x10⁻²⁴
43.
How would you set up the following problem: How many atoms of Strontium (Sr) are found in 3.50 grams of Sr?
a)
Option 1
b)
Option 2
c)
Option 3
d)
Option 4
44.
How many atoms of tin (Sn) are found in 3.50 grams of tin?
a)
1.77x10²² atoms
b)
2.50x10²⁶ atoms
c)
6.90x²² atoms
45.
What is the law of conservation of mass?
4 lines
46.
What is the percent composition of Sodium in NaOH?
a)
22.5%
b)
57.48%
c)
40.0%
d)
2.52%
47.
Other reflective thoughts, comments, suggestions? Anything else you need to tell me?
4 lines
100 %
