Which element has atoms with valence electrons in a higher energy level than those of calcium (Ca)?
(1 point)
Responses
lithium (Li)
cesium (Cs)
bromine (Br)
oxygen (O)
cesium (Cs)
To compare the energy levels of valence electrons, we need to look at the periodic table.
Calcium (Ca) is located in Group 2 or Group IIA of the periodic table, which means it has 2 valence electrons in its outermost energy level.
Among the given options, the element with valence electrons in a higher energy level than calcium is bromine (Br). Bromine is in Group 17 or Group VIIA of the periodic table, so it has 7 valence electrons in its outermost energy level.
Therefore, the correct answer is:
- Bromine (Br)