Which atom would require the most energy to remove the first electron from the valence shell? Ca Mg Rb Na

List the order in which the orbitals are filled as the atoms beyond hydrogen are built up. How many electrons overall can be accommodated in the first and second principal energy levels? How many electrons can be placed in a given s subshell? In a given p subshell? In a specific p orbital? Why do we assign unpaired electrons in the 2p orbitals of carbon, nitrogen, and oxygen?

What is a valence shell?

What is the electron configuration of Ne2?

Identify the generic outer electron configuration for the halogens. ns² np² ns²np¹ ns² np³ ns² np6 O ns²np4 ns² np³

[Review Topics] [References] Name the noble gas atom that has the same electron configuration as each of the ions in the following compo BaCl2 a. Ba²+, [Rn]; CI, [Ne] 2+ Ba²+, [Xe]; CI, [Ar] 2+ Ba²+, [Rn]; CI, [Ar] Ba²+, [Kr]; CI, [Ar] Al2 Te3 b. Al³+, [Ar]; Te², [Xe] O A1³+ , [Ar]; Te², [Kr] Al³+, [Ne]; Te², [Xe] Al³+, [Ne]; Te², [Kr] Na₂O c. ONa+, [He]; 0², [Ar] ONa+, [Ar]; 0², [Ar] ONa+, [Ne]; 0², [Ne] ONa+, [Ne]; 02, [He] K₂ S d. OK+, [Xe]; S², [Ar] OK+, [Kr]; S², [Kr] OK+, [Ar]; S2, [Ar] ©K+, [Ar]; S*, Xe

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The electron configuration of indium is [Kr]5s²4d¹05p¹. How many electrons does a neutral atom of indium have? 49 How does this element complete its octet? Indium forms compounds with chlorine; one example is the formation of InCl (indium (I) chloride). What electron do you think indium gave up? Why?

O ELECTRONIC STRUCTURE AND CHEMICAL BONDING Interpreting the electron configuration of an atom or atomic ion An atomic cation with a charge of +2 has the following electron configuration: 6 1s²2s²2p 3s²3pª What is the chemical symbol for the ion? How many electrons does the ion have? How many 3d electrons are in the ion? U X

Describe the orbital approximation.  How is it related to the atomic electronic configuration.  Describe the trends in the periodic table for size, ionization energy and electronegativity.