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WorksheetsQuiz 7 sec 2 chapter 2 type of elements
Total questions: 20
Worksheet time: 2hrs 40mins
which of the following examples agrees with Dalton’s postulates?
The atoms which are found in a sample of chlorine resemble those which are found in a sample of sulphur
Atoms which form magnesium are tiny
Hydrogen can combine with oxygen to form water in more than one numerical ratio.
The properties of the molecules of hydrogen and oxygen differ from their properties in water molecules.
The electronic configuration of ruthenium ion 44Ru3+ is .......
[Kr], 4d3, 5s2
[Kr], 4d6, 5s2
[Kr], 4d6
[Kr], 4d5
If the element (X) in the periodic table forms the compounds XCl3, X2O3, then (X) is located in group …………
IIIA
IIA
VIIA
IVA
Principles related to the electronic configuration of the first twenty elements can be used to understand patterns of heavier elements.
In what group would you expect to find an element with the electronic configuration [Xe]4f145d106s26p2?
15
18
14
19
The group symbol of representative elements is ........
and the group symbol of main transition element is .....
B,A
A,B
d,A
d,S
The actual electronic configuration of chromium
(18Ar),4s1,3d6
(18Ar),4s1,3d5
(18Ar),4s2,3d5
(18Ar),4s2,3d4
All of the following are among the properties of the elements 4Be, 12Mg, and 20Ca except that? …….
The last sublevel s contains 2 electrons
They are representative elements
The sublevel p in the valence shell contains a pair of electrons
They are located in group (2A)
What is the electronic configuration of a calcium ion (Ca)2+?
1s22s22p63s23p4
1s22s22p63s23p64s23d2
1s22s22p63s23p44s2
1s22s22p63s23p6
it determines the number of sublevels in each principal energy level
spin quantum number
principal quantum number
magnetic quantum number
subsidiary quantum number
it is impossible for two electrons in the same atom to have the same four quantum numbers
hund rule
aufbau principle
pauli exclusion principle
bohr theory
Which of the following choices represents the electronic configuration of a transition element?
1s1 , 2s2 , 2p6 , 3s2 , 3p6 , 3d10 , 4s2 , 4p6
1s1 , 2s2 , 2p6 , 3s2 , 3p6 , 4s2 , 3d2
1s1 , 2s2 , 2p6 , 3s2 , 3p6 , 3d10 , 4s2 , 4p1
1s1 , 2s2 , 2p6 , 3s2 , 3p6 , 4s2
The only noble gas that does not end with ns2, np6 is ………..
Radon
argon
neon
helium
they are characterized by having the energy level completely filled with electrons , except the three outermost energy levels
representative
noble gas
main transition elements
inner transition elements
The last energy sublevel in an element contains 3 orbitals which are X, Y and Z, only X contains one electron, and the sum of its (n+l) equals 5, what is the atomic number of this element? ……………
33
13
31
3
In electric discharging experiments through gases, cathode rays are deflected away from the metal plate which is negatively charged, because they are ….
negatively charged
produced from all materials
positively charged
not material particles
James Chadwick proved the existence of .........
the neutron
the quantum atomic model
the proton
the electron
The elements which follow neon gas are located in the ……… period.
first
fourth
second
third
They occupy the middle of the periodic table
d-block elements
s-block elements
p-block elements
f-block elements
the element which its electronic configuration ends with ns1,(n-1)d10 is located in group
1B
1A
2B
2A
number of elements in the third period is........ and that of the sixth period is .........
8,32
32,8
32,18
18,32
