Could be lithium (ends with 2s1) or beryllium (2s2)
Lithium
2s
The element with only 3 orbitals is lithium (Li). The electron configuration is 1s^2 2s^1, indicating that it has one electron in the 2s orbital.
The element with four 2p electrons is carbon. In its electron configuration, carbon has a total of six electrons, with two occupying the 1s orbital and four in the 2s and 2p orbitals. Specifically, the configuration is 1s² 2s² 2p², indicating that there are two electrons in the 2s subshell and two in the 2p subshell.
Actually the atomic number tells you how many protons there are. And there are 6 elements with 2 electrons. You can find out that out by looking at a periodic table and looking at family 2. Im guessing you won't be able to find the element your looking for unless you know the number of nuetrons or even better the number of protons.
The electron configuration 1s²2s¹ corresponds to the element lithium (Li). Lithium has three electrons, with two in the 1s orbital and one in the 2s orbital. It is an alkali metal, found in group 1 of the periodic table, and is known for its reactivity and use in batteries.
The electron configuration 1s² 2s² 2p⁴ corresponds to the element with the atomic number 16, which is sulfur. The symbol for sulfur is "S."
The configuration [He] 2s2 2p2 describes the element in the 2nd row (since He finishes the first row) in the second of the 'p' columns, #14. This corresponds to the element carbon.
The element with 2 valence electrons in the 2s sublevel is beryllium (Be). It is located in Group 2 of the periodic table and has an atomic number of 4. Beryllium's electron configuration is 1s² 2s², indicating that it has two electrons in the outermost s orbital.
The element with the electron configuration 1s2 2s2 2p6 3s1 is sodium (Na).
This chemical element is calcium (Ca).
The element with 2 electrons in the 1s sub-level, 2 electrons in the 2s sub-level, and 2 electrons in the 2p sub-level is carbon (Atomic number: 6).