Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1.
A. What is the symbol for this element?
B. What is the atomic number of this element?
C. How many unpaired electrons does an atom of this elelemt have?
D. How many valence electrons does an atom of this elelemt have?
E. How many inner shell electrons does an atom of this element have?
F. What is the highest occupied energy level for this element?
Im not sure if its Chromium or Potassium and how would I figure out C-F?
That looks like 19 electrons to me (count them up) which means for the neutral element it must have 19 protons so look on the periodic table for element number 19. By the way, you KNOW it can't be Cr. Why? Cr is in the 3d transition series so it must have 3d electrons and this element doesn't have any 3d electrons.
A. The symbol for this element is Potassium (K).
B. The atomic number of Potassium is 19.
C. An atom of Potassium has 1 unpaired electron.
D. An atom of Potassium has 1 valence electron.
E. An atom of Potassium has 18 inner shell electrons.
F. The highest occupied energy level for Potassium is the 4th energy level.
To determine if it is Chromium or Potassium, you can look at the electron configuration. Chromium has the electron configuration [Ar] 3d5 4s1, while Potassium has the electron configuration [Ar] 4s1. Since the given electron configuration matches Potassium, the element in question is Potassium.
To determine the element with the given electron configuration (1s2 2s2 2p6 3s2 3p6 4s1), we can follow these steps:
A. To find the symbol for this element, we need to look at the electron configuration. The last electron corresponds to the 4s orbital, so the symbol for this element is Potassium (K).
B. The atomic number of an element represents the number of protons in its nucleus. Since we know the element is Potassium (K), the atomic number is 19.
C. Unpaired electrons are located in the outermost energy level (valence shell) of an atom. In this case, the 4s1 electron is unpaired. Thus, the atom of Potassium has 1 unpaired electron.
D. Valence electrons are the electrons in the outermost energy level. For Potassium (K), there is 1 valence electron.
E. Inner shell electrons are the electrons in energy levels below the outermost energy level. In this case, the inner shell electrons are the electrons in the levels 1s, 2s, 2p, 3s, and 3p. Counting these, we have a total of 18 inner shell electrons.
F. The highest occupied energy level is the highest energy level that contains electrons. In this case, it is the 4th energy level (4s and 3p orbitals). Thus, the highest occupied energy level for Potassium is the 4th energy level.
In summary:
A. The symbol for this element is K (Potassium).
B. The atomic number of this element is 19.
C. An atom of this element has 1 unpaired electron.
D. An atom of this element has 1 valence electron.
E. An atom of this element has 18 inner shell electrons.
F. The highest occupied energy level for this element is the 4th energy level.
To determine the element with the given electron configuration (1s2 2s2 2p6 3s2 3p6 4s1), we need to count the number of electrons in each energy level and refer to the periodic table.
A. The symbol for the element can be determined based on its atomic number.
B. The atomic number corresponds to the number of protons in the nucleus of an atom, which is equal to the number of electrons in a neutral atom. To find the atomic number, count the total number of electrons in the electron configuration. In this case, we have:
1s2 (2 electrons) + 2s2 (2 electrons) + 2p6 (6 electrons) + 3s2 (2 electrons) + 3p6 (6 electrons) + 4s1 (1 electron)
Adding these up gives us a total of 19 electrons. Therefore, the atomic number is 19.
C. To determine the number of unpaired electrons, we look at the last electron or the highest energy level. In this case, the last electron is located in the 4s1 orbital. Since there is only one electron in this orbital, it is unpaired. Therefore, this element has 1 unpaired electron.
D. Valence electrons are the electrons located in the outermost energy level (highest principal quantum number). In this case, the outermost energy level is the 4th energy level (4s1). Therefore, the element has 1 valence electron.
E. Inner shell electrons are the electrons located in the energy levels below the outermost energy level. In this case, the inner shell electrons are located in the 1st, 2nd, and 3rd energy levels, as indicated by the electron configuration. Counting the electrons in these energy levels, we have a total of:
1s2 (2 electrons) + 2s2 (2 electrons) + 2p6 (6 electrons) + 3s2 (2 electrons) + 3p6 (6 electrons)
Adding these up gives us 18 inner shell electrons.
F. The highest occupied energy level is the outermost energy level that contains electrons. For this element, the highest occupied energy level is the 4th energy level.
Based on the information provided, the element with the given electron configuration (1s2 2s2 2p6 3s2 3p6 4s1) is Potassium (K).