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Basic Chemistry - Elements MCQs

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Basic Chemistry - Elements

Basic Chemistry - Elements MCQs With Answers

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CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which class of elements generally conducts heat and electricity well?
A. Metals
B. Halogens only
C. Noble gases only
D. Nonmetals only
Correct Answer: A
Metals typically have mobile electrons that enable good electrical and thermal conduction.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Elements in the same vertical column of the periodic table are called a what?
A. Series only
B. Isotope
C. Period
D. Group
Correct Answer: D
Vertical columns in the periodic table are groups.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which element is the most abundant in the universe?
A. Silicon
B. Hydrogen
C. Iron
D. Oxygen
Correct Answer: B
Hydrogen is by far the most abundant element in the universe.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which element is the most abundant in Earth's atmosphere by volume?
A. Hydrogen
B. Nitrogen
C. Oxygen
D. Carbon
Correct Answer: B
Dry air is about 78% nitrogen by volume.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which symbol represents iron?
A. Fe
B. Ir
C. I
D. In
Correct Answer: A
Iron's symbol Fe comes from Latin ferrum.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which symbol represents the element sodium?
A. Na
B. Sd
C. So
D. S
Correct Answer: A
The chemical symbol for sodium is Na, from Latin natrium.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Can an element be decomposed into simpler substances by ordinary chemical means?
A. Only by filtration
B. No
C. Yes, always
D. Only in water
Correct Answer: B
An element cannot be broken into simpler substances by ordinary chemical reactions.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
Which is an example of an element?
A. Sodium chloride
B. Oxygen
C. Water
D. Carbon dioxide
Correct Answer: B
Oxygen is an element; the others are compounds.
CSS - PMS - CCE - PCS - General Science Basic Chemistry - Elements
What is a chemical element?
A. A solution that can be filtered
B. A pure substance made of atoms with the same number of protons
C. A compound containing carbon only
D. A mixture of any two substances
Correct Answer: B
An element is defined by a unique atomic number, or proton count.
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