Q. What is the charge of a neutron?
-
A.
Positive
-
B.
Negative
-
C.
Neutral
-
D.
Variable
Solution
Neutrons have no charge; they are neutral particles found in the nucleus of an atom.
Correct Answer:
C
— Neutral
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Q. What is the primary component of the atomic nucleus?
-
A.
Electrons
-
B.
Protons and Neutrons
-
C.
Ions
-
D.
Molecules
Solution
The atomic nucleus is primarily composed of protons and neutrons.
Correct Answer:
B
— Protons and Neutrons
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Q. What is the smallest unit of an element that retains its properties?
-
A.
Molecule
-
B.
Atom
-
C.
Compound
-
D.
Ion
Solution
An atom is the smallest unit of an element that retains its chemical properties.
Correct Answer:
B
— Atom
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Q. What is the term for a substance made of two or more atoms bonded together?
-
A.
Element
-
B.
Compound
-
C.
Mixture
-
D.
Solution
Solution
A compound is a substance made of two or more atoms bonded together.
Correct Answer:
B
— Compound
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Q. What type of bond involves the sharing of electron pairs between atoms?
-
A.
Ionic bond
-
B.
Covalent bond
-
C.
Hydrogen bond
-
D.
Metallic bond
Solution
Covalent bonds involve the sharing of electron pairs between atoms.
Correct Answer:
B
— Covalent bond
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Q. Which of the following is a diatomic molecule?
-
A.
O2
-
B.
H2O
-
C.
CO2
-
D.
NaCl
Solution
O2 (oxygen) is a diatomic molecule, consisting of two oxygen atoms.
Correct Answer:
A
— O2
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Q. Which of the following is a molecule made of two or more different elements?
Solution
H2O (water) is a molecule made of two different elements: hydrogen and oxygen.
Correct Answer:
B
— H2O
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Q. Which of the following represents an ionic bond?
-
A.
NaCl
-
B.
H2O
-
C.
CO2
-
D.
O2
Solution
NaCl (sodium chloride) represents an ionic bond formed between sodium and chlorine.
Correct Answer:
A
— NaCl
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Q. Which particle is found outside the nucleus of an atom?
-
A.
Proton
-
B.
Neutron
-
C.
Electron
-
D.
Quark
Solution
Electrons are found in the electron cloud outside the nucleus of an atom.
Correct Answer:
C
— Electron
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Q. Which subatomic particle has a positive charge?
-
A.
Electron
-
B.
Neutron
-
C.
Proton
-
D.
Photon
Solution
Protons are positively charged subatomic particles found in the nucleus of an atom.
Correct Answer:
C
— Proton
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