What is the element with an electron configuration of 1s22s22p63s23p64s23d7?
looks like cobalt to me.
The electron configuration you provided belongs to the element Technetium (Tc), which has an atomic number of 43. The electron configuration 1s22s22p63s23p64s23d7 represents the distribution of electrons in its various atomic orbitals.
To determine the element with the given electron configuration, you need to refer to the periodic table.
The electron configuration you provided, 1s22s22p63s23p64s23d7, can be broken down as follows:
1s2: This means that there are two electrons occupying the 1s orbital.
2s2: This means that there are two electrons occupying the 2s orbital.
2p6: This means that there are six electrons occupying the 2p orbital.
3s2: This means that there are two electrons occupying the 3s orbital.
3p6: This means that there are six electrons occupying the 3p orbital.
4s2: This means that there are two electrons occupying the 4s orbital.
3d7: This means that there are seven electrons occupying the 3d orbital.
Now, if we add up the total number of electrons:
2 + 2 + 6 + 2 + 6 + 2 + 7 = 27
The atomic number of an element on the periodic table represents the number of protons in its nucleus and it also corresponds to the number of electrons in its neutral state. Therefore, we can conclude that the element with the given electron configuration (1s22s22p63s23p64s23d7) has 27 electrons.
To identify the element, you can look at the periodic table and find the element with an atomic number of 27, which is Cobalt (Co). Thus, the element with the given electron configuration is Cobalt (Co).