Question

1. how many valence electrons does the element krypton have?
2. are shared electrons counted as being owned by both elements in a compound?
3. what element is represented by the following electron - configuration equation, 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p3

Explanation:

1. Krypton is a noble - gas in group 18 of the periodic table. Noble gases typically have 8 valence electrons.
2. In a covalent compound, shared electrons in a bond are considered to be part of the outer - shell of both atoms involved in the bond.
3. To determine the element from the electron configuration, sum the number of electrons. The sum of electrons in 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p³ is 33. Ar has 18 electrons, Au has 79 electrons, and As (not listed as an option but correct) has 33 electrons. Among the options, there is a mis - typing. Assuming it was meant to be As, we can identify the element based on electron count.

Answer:

1. C. 8
2. A. Yes
3. (There is an error in options. If it was meant to be As, that would be the answer. But among given options, no correct answer)