Download Ground state electron arrangement

ELECTRONS AND ENERGY LEVELS
Name ___________________________________ Date______ Period ___
1.
The lowest allowable energy state of an atom is called its ___________________________________________
2.
According to Bohr’s atomic model, the smaller an electron’s orbit, the ______________ the atom’s energy level.
3.
According to Bohr’s atomic model, the larger an electron’s orbit, the _________________the atom’s energy level.
4.
The electrons in an atom’s outermost orbitals are called _______________________________________
5.
In an electron-dot structure, the element’s symbol represents the __________________ ___________________
6.
Which electrons are represented by the dots in an electron-dot structure? _________________________________
7.
8.
9.
Which sublevel s or p has higher energy? Why?
For each of the following values of n, indicate the number and types of sublevels possible for that main energy
level
a) n=1__________ b) n=2__________
c) n=3___________
In your own words define the relationship between n and the total number of sublevels in the main energy level?
10.
According to the Bohr model, how do electrons move in atoms? _____________________________________
11.
What is an atomic orbital?_____________________________________________________________________
12.
What are valence electrons? _______________________________________________________
______________________________________________________________________________
How many of a chlorine atom’s 17 electrons are valence electrons? ____________________
13.
Draw electron-dot structures for atoms of the following elements.
Mg
S
Br
Xe
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ELECTRONS AND ENERGY LEVELS
Name ___________________________________ Date______ Period ___
1.
The lowest allowable energy state of an atom is called its ___________________________________________
2.
According to Bohr’s atomic model, the smaller an electron’s orbit, the ______________ the atom’s energy level.
3.
According to Bohr’s atomic model, the larger an electron’s orbit, the _________________the atom’s energy level.
4.
The electrons in an atom’s outermost orbitals are called _______________________________________
5.
In an electron-dot structure, the element’s symbol represents the __________________ ___________________
6.
Which electrons are represented by the dots in an electron-dot structure? _________________________________
7.
8.
9.
Which sublevel s or p has higher energy? Why?
For each of the following values of n, indicate the number and types of sublevels possible for that main energy
level
a) n=1__________ b) n=2__________
c) n=3___________
In your own words define the relationship between n and the total number of sublevels in the main energy level?
10.
According to the Bohr model, how do electrons move in atoms? _____________________________________
11.
What is an atomic orbital?_____________________________________________________________________
12.
What are valence electrons? _______________________________________________________
______________________________________________________________________________
How many of a chlorine atom’s 17 electrons are valence electrons? ____________________
13.
Draw electron-dot structures for atoms of the following elements.
Mg
S
Br
Xe
14.
Write ground-state electron configurations for the following elements.
a. Chlorine _________________________________________________
b. Silicon _________________________________________________
c. Carbon _________________________________________________
15.
What elements are represented by each of the following electron configurations?
1s2 2s2 2p5 _____________________
1s2 2s2 2p2 _____________________
1s2 2s1 ________________________
16.
Find a mistake and write a correct configuration
1s2 2s1 2p4 _________________________ 2s2 3s2 2p6 3p5 ________________________
Write the electron configuration notation for an element that contains the following number of electrons
a) 3 ________________________________
17.
b)
6 ________________________________
c)
8 ________________________________
d) 13 _______________________________
Challenging quetion
18. What is noble-gas notation, and why is it used to write electron configurations?
_____________________________________________________________________________________________
____________________________________________________________________________________________
_____________________________________________________________________________________________
Write noble gas notation for the above atoms
14.
Write ground-state electron configurations for the following elements.
d. Chlorine _________________________________________________
e. Silicon _________________________________________________
f. Carbon _________________________________________________
15.
What elements are represented by each of the following electron configurations?
1s2 2s2 2p5 _____________________
1s2 2s2 2p2 _____________________
2
1
1s 2s ________________________
16.
Find a mistake and write a correct configuration
1s2 2s1 2p4 _________________________ 2s2 3s2 2p6 3p5 ________________________
Write the electron configuration notation for an element that contains the following number of electrons
a) 3 ________________________________
17.
b)
6 ________________________________
c)
8 ________________________________
d) 13 _______________________________
Challenging quetion
18. What is noble-gas notation, and why is it used to write electron configurations?
_____________________________________________________________________________________________
____________________________________________________________________________________________
_____________________________________________________________________________________________
Write noble gas notation for the above atoms
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Not used 2011
19.
The arrangement of electrons in an atom is called the atom’s (1)_____________________________ .
Electrons in an atom tend to assume the arrangement that gives the atom the (2)
_____________________possible energy.
This arrangement of electrons is the most (3) _______________________arrangement and is called the atom’s
(4) _______________________________________
20.
What is the difference between an atom’s ground state and an excited state?
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
21.
Bohr proposed that when energy is added to a hydrogen atom, its ___________________________moves to a
higher-energy orbit