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[h] Unit 1 – Chapter 2
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[start]
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20064e176b82db” question_number=”1″] Knowing just the atomic mass of an element allows inferences about which of the following?
A) the chemical properties of the element
B) the number of protons in the element
C) the number of neutrons in the element
D) the number of protons plus neutrons in the element
E) both the number of protons and the chemical properties of the element
[a] D the number of protons plus neutrons in the element
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20063923007edb” question_number=”2″] In what way are elements in the same column of the periodic table the same?
A) They have the same number of protons.
B) They have the same number of neutrons.
C) They have the same number of electrons.
D) They have the same number of electrons in their valence shell.
E) They have the same number of electron shells.
[a] D) They have the same number of electrons in their valence shell.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20062682a15edb” question_number=”3″] An atom has 6 electrons in its outer shell. How many unpaired electrons does it have?
A) 0
B) 2
C) 4
D) 6
E) 2 or 4
[a] B) 2
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|200616364e22db” question_number=”4″] From its atomic number of 15, it is possible to predict that the phosphorus atom has
A) 15 neutrons.
B) 15 protons.
C) 15 electrons.
D) 8 electrons in its outermost electron shell.
E) 15 protons and 15 electrons.
[a] E) 15 protons and 15 electrons.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|200605e9fae6db” question_number=”5″] What is the term for the smallest unit of matter that retains the properties of a particular element?
A) Atom B) Molecule C) Compound D) Ion E) Proton
[a] A) Atom
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|2005f3499bc6db” question_number=”6″] Which subatomic particles are found in the nucleus of an atom?
A) Protons and neutrons
B) Electrons and protons
C) Neutrons and electrons
D) Only protons
E) Only neutrons
[a] A) Protons and neutrons
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|2005e2fd488adb” question_number=”7″] A covalent bond is formed when atoms ________ electrons.
A) Donate
B) Accept
C) Share
D) Lose
E) Gain
[a] C) Share
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|2005d2b0f54edb” question_number=”8″] What is the pH of a neutral solution?
A) 0
B) 7
C) 14
D) 3
E) 10
[a] B) 7
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|2005bdbc8a4adb” question_number=”9″] Which type of bond is formed between a hydrogen atom and an oxygen atom in a water molecule?
A) Ionic bond
B) Covalent bond
C) Hydrogen bond
D) Metallic bond
E) Van der Waals bond
[a] B) Covalent bond – Question is asking about bond between hydrogen atom and oxygen atom, so it’s covalent bond. Hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20059f77efb6db” question_number=”10″] Which property of water allows it to act as a universal solvent?
A) Its polarity
B) Its high heat capacity
C) Its cohesive properties
D) Its adhesive properties
E) Its ability to form hydrogen bonds
[a] A) Its polarity
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|200581335522db” question_number=”11″] What is the term for a substance that resists changes in pH? A) Buffer B) Acid C) Base D) Salt E) Catalyst
[a] A) Buffer
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|200570e701e6db” question_number=”12″] Which type of organic molecule is the primary energy source for cells? A) Carbohydrates B) Lipids C) Proteins D) Nucleic acids E) Water
[a] A) Carbohydrates
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20055e46a2c6db” question_number=”13″] Which type of organic molecule is composed of amino acids?
A) Carbohydrates
B) Lipids
C) Proteins
D) Nucleic acids
E) Water
[a] C) Proteins
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20054dfa4f8adb” question_number=”14″] What is the difference between an atom and an ion?
[a] An atom is a neutral particle with equal numbers of protons and electrons, while an ion is a charged particle that has gained or lost electrons.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|20053b59f06adb” question_number=”15″] Explain the role of valence electrons in chemical bonding.
[a] Valence electrons are the outermost electrons of an atom, and they determine the atom’s chemical reactivity. They participate in chemical bonding by forming bonds with other atoms.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|200521bd6d9edb” question_number=”16″] What is the difference between a polar covalent bond and a nonpolar covalent bond?
[a] In a polar covalent bond, the electrons are shared unequally between the atoms, creating a partial positive charge on one atom and a partial negative charge on the other. In a nonpolar covalent bond, the electrons are shared equally between the atoms.
[q json=”true” unit=”Unit1″ topic=”Chapter2″ dataset_id=”Unit1-Chapter2|2004d98ffd02db” question_number=”17″] Describe the properties of water and how they contribute to its importance in living organisms. [a] Water has several unique properties, including polarity, high heat capacity, cohesion, adhesion, and the ability to form hydrogen bonds. These properties allow water to play essential roles in living organisms, such as acting as a solvent, regulating temperature, transporting substances, and supporting cellular structures.
[x] [restart]
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