General Science — Chemistry
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Showing 1–5 of 5 questions
in Chemistry
Hardest natural substance?
Correct Answer:
C. Diamond
EXPLANATION
Diamond = 10 on Mohs scale.
Liquid to gas process?
Correct Answer:
C. Evaporation
EXPLANATION
Evaporation = liquid to gas.
Atomic number of Carbon?
Correct Answer:
A. 6
EXPLANATION
Carbon atomic number = 6.
Chemical formula of water?
Correct Answer:
B. H2O
EXPLANATION
Water = H₂O.
Which of the following elements has the highest electronegativity value on the Pauling scale?
Correct Answer:
A. Fluorine
EXPLANATION
Fluorine has the highest electronegativity value of 3.98 on the Pauling scale, making it the most electronegative element.
This is because it has the smallest atomic radius and the highest effective nuclear charge among all elements, causing it to attract electrons most strongly in a chemical bond.