which element in period 4 has four electrons in its electron-dot structure ?
Usually this is for the ion. For the atom you must be thinking Ti.
In period 4 of the periodic table, the element that has four electrons in its electron-dot structure is silicon (Symbol: Si). Silicon has the atomic number 14, which means it has 14 electrons. Its electron-dot structure can be represented as follows:
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: Si :
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As you can see, there are four electrons represented by four dots around the symbol of silicon.
To find the element in period 4 with four electrons in its electron-dot structure, we need to look at the periodic table.
Period 4 is the fourth row of elements in the periodic table. Let's count the elements in period 4 and their electron configurations.
Starting from left to right in period 4:
1. The first element is potassium (K) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹].
2. The second element is calcium (Ca) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s²].
3. The third element is scandium (Sc) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹].
4. The fourth element is titanium (Ti) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²].
5. The fifth element is vanadium (V) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³].
6. The sixth element is chromium (Cr) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d⁵].
7. The seventh element is manganese (Mn) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵].
8. The eighth element is iron (Fe) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶].
9. The ninth element is cobalt (Co) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷].
10. The tenth element is nickel (Ni) with an electron configuration of [1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸].
From the electron configurations, we can see that the element in period 4 with exactly four electrons in its electron-dot structure is titanium (Ti).