which element has atoms with valence electrons in a higher energy level than those of calcium (ca)? (1…

which element has atoms with valence electrons in a higher energy level than those of calcium (ca)? (1 point) oxygen (o) bromine (br) cesium (cs) lithium (li)

which element has atoms with valence electrons in a higher energy level than those of calcium (ca)? (1 point) oxygen (o) bromine (br) cesium (cs) lithium (li)

Answer

Explanation:

Step1: Determine calcium's energy level

Calcium (Ca) is in the 4th period. Its valence - electrons are in the n = 4 energy level.

Step2: Analyze each option's energy level

  • Oxygen (O) is in the 2nd period, so its valence - electrons are in the n = 2 energy level.
  • Bromine (Br) is in the 4th period, so its valence - electrons are in the n = 4 energy level.
  • Cesium (Cs) is in the 6th period, so its valence - electrons are in the n = 6 energy level.
  • Lithium (Li) is in the 2nd period, so its valence - electrons are in the n = 2 energy level.

Step3: Compare energy levels

We are looking for an element with valence - electrons in a higher energy level than n = 4. Cesium (Cs) with n = 6 meets this requirement.

Answer:

cesium (Cs)