Chromium, calcium, and potassium are near each other on the periodic table and have some common characteristics but differ in chemical reactivity. Which lists these metals in order from most reactive to least reactive?
calcium, chromium, potassium
chromium, calcium, potassium
potassium, calcium, chromium
potassium, chromium, calcium
Answers
Answer:
Potassium > Calcium> Chromium.( Descending order of reactivity)
Explanation:
Potassium, Calcium and Chromium belong to the same period i.e. 4th period.
We know that metallic character decreases across a period. Also, the ionisation enthalpy increases. Ionisation enthalpy is the quantitative measure of the tendency of an element to form a cation.
Increase in ionisation enthalpy ( which is also called as ionisation potential or ionisation energy) makes electrons to be more tightly binded with the nucleus, hence the atom possesses less tendency to lose electrons.
Across a period, we find that atoms don't readily lose electrons. Hence they tend to become less reactive.
Hope it helps!!!
Answer:
C. Potassium, Calcium, Chromium
Explanation:
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