Physical Science Final Exam (Sem 1)
Semester Exam: Introduction to Chemistry:Textbook Chapters:0. Introduction to Science1. Introduction to Matter2. Solids, Liquids, and Gases3. Atoms and the Periodic Table4. Chemical Bonds5. Chemical Reactions
- 1.The ion calcium (Ca2+) and the ion Chlorine (Cl1-) form a compound with the formula: A) CaCl B) Ca2Cl C) CaCl2 D) Cl2Ca E) Ca2Cl2
- A.
A
- B.
B
- C.
C
- D.
D
- E.
E
- 2.Which of these ions is a polyatomic ion?A) Ca2+ B) OH1- C) Mg2+ D) Br1-
- A.
Ca2+
- B.
OH1-
- C.
Mg2+
- D.
Br1-
- 3.What is the net electrical charge for all chemical compounds?
- A.
Positive
- B.
Negative
- C.
Neutral
- 4.. What is the chemical name for the ionic compound with the chemical formula: LiBr?
- A.
Lithium Bromine
- B.
Lithide Bromine
- C.
Lithium Bromide
- D.
Bromine Lithide
- 5.To form an ionic bond the ions are formed when the valence electron(s) is/ are ____
- A.
SHARED
- B.
TRANSFERRED
- C.
DESTROYED
- D.
POLARIZED
- 6.Magnesium becomes a 2+ ion by __________.
- A.
losing 2 valence electrons.
- B.
Gaining 2 valence electrons.
- C.
First gaining 4 electrons and losing 2 electrons.
- D.
Sharing two electrons with another element.
- 7.An element “X” bonds with sulfur to form a neutral ionic compound with the formula X2S3. What is the ion charge of the element “X”?
- A.
1+
- B.
2+
- C.
3+
- D.
4+
- 8.For a neutral atom to become an ion it will lose or gain
- A.
Neutrons
- B.
Protons
- C.
Electrons
- D.
Nucleons
- 9.Ionic bonds form when… a) two atoms come close enough to begin sharing electrons. b) two atoms begin attracting each other electrons. c) an electron transfer creates two oppositely charged ions. d) all the above are true.
- A.
two atoms come close enough to begin sharing electrons.
- B.
Two atoms begin attracting each other electrons.
- C.
an electron transfer creates two oppositely charged ions.
- D.
all the above are true.
- 10.. Which of the following elements is LEAST likely to become an ion?
- A.
Ca
- B.
O
- C.
Al
- D.
Ne
- 11.. Which of the following pairs of elements will make an ionic bond?
- A.
Mg and Al
- B.
Sr and I
- C.
C and s
- D.
Ne and Kr
- 12.A covalent bond forms when …
- A.
two atoms are each trying to take each other’s electrons while holding onto their own electrons
- B.
two atoms trade their valence electrons.
- C.
A transfer of electrons occurs between two metallic atoms.
- D.
a transfer of electrons occur between a metallic and a nonmetallic electron.
- 13.When chemists write chemical formulas for compounds, which ion is written first in the compound’s chemical formula?
- A.
negative ion
- B.
polyatomic ion
- C.
Nonmetallic ion
- D.
Positive ion
- 14.Which of these pairs of elements is most likely to make a covalent bond?
- A.
He and H
- B.
Li and S
- C.
Mg and Sn
- D.
H and O
- 15.Which of the following does not indicate a chemical change has occurred?
- A.
Color change
- B.
Formation of a precipitate
- C.
Change in surface area
- D.
Gas production
- 16.. When balancing equation, you are only allowed to change the _________ in the chemical equation.
- A.
Products
- B.
Reactants
- C.
Coefficients
- D.
Subscripts
- 17.Which of the following equation is chemically balanced? a) 2H2O à H2 + O2b) Zn + 2HCl à ZnCl2 + H2c) C2H5OH + 2O2 à 3CO2 + 3H2Od) NaOH + 2HCl à NaCl + H2O
- A.
A
- B.
B
- C.
C
- D.
D
- 18.The burning of wood is an example of a ____________ reaction.
- A.
Exothermic
- B.
Endothermic
- C.
Nuclear
- D.
Terminal
- 19.
The reaction graph below represents a ________ reaction.- A.
Endothermic
- B.
Exothermic
- 20.
In the Potential Energy in a Chemical Reaction graph above, it can be observed that ________ have more potential energy.
- A.
The reactants
- B.
Products
- C.
Substance C
- D.
Substance AB
- 21.When chemical bonds are broken and new substances are created a chemist states ______ has occurred.
- A.
A nuclear reaction
- B.
A chemical reaction
- C.
No change has occurred
- D.
Mass destruction
- 22.Study the chemical equation below. Identify the chemical products and reactants. Mg + HCl à MgCl2 + H2 a) Reactants = Mg and Cl, Products = MgCl2 and H2 b) Reactants = Mg and HCl, Products = MgCl2 and H2 c) Reactants = MgCl2 and H2, Products = Mg and HCl d) Reactants = MgCl and H2, Products = MgCl2 and HCl
- A.
A
- B.
B
- C.
C
- D.
D
- 23.In the diagram below is the chemical reaction balanced?
- A.
Yes
- B.
No
- C.
This is not a chemical reaction
- 24.In this chemical formula for aluminum Sulfate, 4Al2(SO4)3, how many atoms of each element are indicated by the formula?
- A.
4 aluminum, 12 sulfur, and 48 oxygen atoms
- B.
8 aluminum, 12 sulfur, and 48 oxygen atoms
- C.
8 aluminum, 12 oxygen, and 12 oxygen atoms
- D.
4 aluminum, 3 sulfur, and 48 oxygen atoms
- 25.. In the formula for 6 molecules of sodium sulfate, 6Na2SO4, what is the subscript for the sulfur atom?
- A.
6
- B.
2
- C.
1
- D.
4
Questions: 15 | Attempts: 6968 | Last updated: Mar 21, 2022
-
Sample QuestionThermal energy is the __________ of the particles in a material.
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-
Sample QuestionWhen an object's distance from another object is changing.
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-
Sample QuestionA transverse wave composed of an oscillating electric field and a magnetic field that oscillates perpendicular to the electric field is called:
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