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Section 3: Electron Configurations

Electron Configurations


1.	What is the wavelength of an object moving at 19.4 m/s and having a mass of 1000 kg? Need a Hint?
		A)	1.3 x 10^-38 m
		B)	3.4 x 10^-38 m
		C)	3.4 x 10^-34 m
		D)	34 m


2.	How many electrons can an orbital contain? Need a Hint?
		A)	1
		B)	2
		C)	3
		D)	4


3.	What is the symbol of the element that has the following electron configuration? 1s²2s²2px²2py²2pz²3s²3px²3py²3pz¹ Need a Hint?
		A)	Si
		B)	P
		C)	S
		D)	Cl


4.	The principle that states each electron occupies the lowest energy orbital available is the ______________. Need a Hint?
		A)	aufbau principle
		B)	uncertainty principle
		C)	exclusion principle
		D)	photoelectric principle


5.	What is the electron configuration for tin (Sn)? Need a Hint?
		A)	[Kr]5s²3d¹⁰3f¹⁴5p⁴
		B)	[Kr]5s²3d¹⁰4d¹⁴5p⁴
		C)	[Kr]5s²3d¹⁰4f¹⁴5p²
		D)	[Kr]5s²4d¹⁰5p²


6.	The valence orbitals in an atom are the ___________. Need a Hint?
		A)	innermost orbitals
		B)	second energy level
		C)	d orbitals
		D)	outermost orbitals


7.	What is an electron dot structure? Need a Hint?
		A)	An element symbol surrounded by dots representing its valence electrons.
		B)	An element symbol surrounded by its innermost electrons.
		C)	An element symbol with a positive charge.
		D)	A filled noble gas in brackets plus the remaining electron configuration expressed by filled orbitals.


8.	An element with the outermost electron configuration, ns²np⁴, could be _______. Need a Hint?
		A)	Pb
		B)	Zr
		C)	Mo
		D)	Se


9.	An element whose atoms have four valence electrons is _______. Need a Hint?
		A)	Nb
		B)	Cr
		C)	Sn
		D)	Ti


10.	The total number of electrons in s orbitals in a germanium atom is ________. Need a Hint?
		A)	18
		B)	15
		C)	8
		D)	6


11.	How many electrons are in the highest energy p orbitals of a group 4A atom? Need a Hint?
		A)	1
		B)	2
		C)	3
		D)	4


12.	How many valence electrons does a group 1A metal atom have? Need a Hint?
		A)	1
		B)	2
		C)	3
		D)	4