This alkali metal is Rubidium Rb, having atomic no 37
The 4s sublevel is completed when it contains a total of two electrons. In the context of electron configuration, this sublevel is filled before the 3d sublevel, according to the Aufbau principle. Thus, the 4s sublevel is filled before the 3d sublevel begins to receive electrons.
The element that completes the 4s sublevel is calcium (Ca). It has the atomic number 20, which means it has 20 electrons. The electron configuration of calcium is (1s^2 2s^2 2p^6 3s^2 3p^6 4s^2), indicating that the 4s sublevel is filled after the 3p sublevel.
The correct electron configuration for an element with 5 electrons in the 3d energy sublevel is represented as ( \text{[Ar]} , 3d^5 ). This indicates that the element has a total of 23 electrons, placing it in the transition metals category, specifically manganese (Mn). The full electron configuration would be ( \text{[Ar]} , 4s^2 , 3d^5 ).
The 4s sublevel is completed by the element calcium, which has an atomic number of 20. In the electron configuration of calcium, the 4s sublevel is filled after the 3p sublevel, resulting in the configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s². Therefore, the completion of the 4s sublevel occurs when two electrons occupy it.
Iron (Fe) has the electron configuration of [Ar] 3d^6 4s^2. The sublevels for iron include the 4s sublevel, which is filled before the 3d sublevel, and the 3d sublevel, which contains six electrons. Thus, the relevant sublevels for iron are 4s and 3d.
The element that completes the 7s sublevel is radium, with the electron configuration 7s2.
The 2p sublevel is completed with six electrons and is found in elements from carbon (C) onwards. The seventh element, nitrogen (N), is the element that completes the 2p sublevel.
The 4s sublevel is completed when it contains a total of two electrons. In the context of electron configuration, this sublevel is filled before the 3d sublevel, according to the Aufbau principle. Thus, the 4s sublevel is filled before the 3d sublevel begins to receive electrons.
The 3p sublevel is completed by the noble gas element Argon (Ar) which has 18 electrons in total.
B. 1s22s22p63s23p64s23d5----Chromium: [Ar]1s22s22p63s23p63d54s1Manganese: [Ar]1s22s22p63s23p63d54s2
The element that completes the 4s sublevel is calcium (Ca). It has the atomic number 20, which means it has 20 electrons. The electron configuration of calcium is (1s^2 2s^2 2p^6 3s^2 3p^6 4s^2), indicating that the 4s sublevel is filled after the 3p sublevel.
1s2 2s2 2p6 3s2 3p6 4s2 3d5
The 5p sublevel is completed with 6 electrons with the addition of the element radon (Rn).
The correct electron configuration would be 3d5 as each orbital in the 3d sublevel can hold up to 2 electrons, and we have 5 electrons to place in this sublevel.
The 3d sublevel is not filled until after the 4s sublevel, because the 3d sublevel has more energy than the 4s sublevel, and less energy than the 4p sublevel.
The correct electron configuration for an element with 5 electrons in the 3d energy sublevel is represented as ( \text{[Ar]} , 3d^5 ). This indicates that the element has a total of 23 electrons, placing it in the transition metals category, specifically manganese (Mn). The full electron configuration would be ( \text{[Ar]} , 4s^2 , 3d^5 ).
The 2s sublevel can hold a maximum of 2 electrons.