Which of the following phrases describes core electrons?A.Electrons that determine an atom's propertiesB.Electrons that are farthest from the nucleusC.Electrons that are closest to the nucleusD.Electrons that are involved in chemical reactions
Question
Which of the following phrases describes core electrons?A.Electrons that determine an atom's propertiesB.Electrons that are farthest from the nucleusC.Electrons that are closest to the nucleusD.Electrons that are involved in chemical reactions
Solution
The phrase that describes core electrons is C. Electrons that are closest to the nucleus.
Here's why:
Core electrons are the inner electrons of an atom, they are not involved in bonding and they are closest to the nucleus. They are tightly bound to the nucleus and shield the outer (valence) electrons from the positive charge of the protons in the nucleus.
Option A is incorrect because it's the valence electrons (the outermost electrons) that determine an atom's properties, not the core electrons.
Option B is incorrect because core electrons are not the farthest from the nucleus, they are the closest.
Option D is incorrect because core electrons are not typically involved in chemical reactions. It's the valence electrons that participate in chemical reactions.
Similar Questions
How does one determine the number of core electrons an atom has?A.Subtract the group number from the atomic number.B.Add the group number and the period number.C.Subtract the atomic number from the atomic mass.D.Add the atomic number and the number of valence electrons.
Which of the following phrases describes how the position of an electron relates to its energy?A.The closer an electron is to the nucleus, the higher the energy level it is in.B.The electrons within the core of the atom possess the highest energy.C.The farther an electron is from the nucleus, the greater its energy.D.The farther an electron is from the nucleus, the lower its energy.
Electrons closest to the nucleus have the ____________ energy
Which electrons are the valence electrons of the atom?A.The electrons closest to the nucleusB.The electrons farthest away from the nucleusC.The electrons that have lost their chargeD.The electrons that have entered the nucleus
Learning goal 2: Select the option that best completes the sentence. Valence electrons are the electrons located in:the innermost shellthe nucleusthe outermost occupied shellthe middle shell
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