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Worksheetsquiz 10 sec 2
Total questions: 20
Worksheet time: 2hrs 40mins
How many orbitals are found in s subshell?
1 orbital
2 orbitals
5 orbitals
3 orbitals
Which of the following molecules has 1s and 3p orbitals overlapping?
HCl
CH4
N2
Cl2
When a sample whose mass is 1g of phosphorus-35 isotope is left for 14 days, it is found that the mass of the sample decreased by half, this observation does not match ………
Democritus’s idea of the atom only
Boyle’s idea of matter only
Dalton’s atomic model
Democritus’s and Boyle’s ideas and Dalton’s atomic model.
What does happen to the electron by increasing the distance between its orbital and the nucleus? ……………
Both its kinetic and potential energies decrease.
Its kinetic energy decreases and its potential energy increases
Both its kinetic and potential energies increase
Its kinetic energy increases and its potential energy decreases
What is the correct order of the orbitals in titanium atom according to the increase of energy? ……………
3s < 3p < 3d < 4s
3s < 3p < 4s < 3d
3s < 4s < 3p < 3d
4s < 3s < 3p < 3d
Among the modification of the modern atomic theory in the older theories is ……………
it is impossible to determine both the position and speed of the 11th electron in 11Na atom precisely.
the electron is negatively charged.the electron is negatively charged.
most of the atomic volume is an empty space
the spaces between energy levels are forbidden for the electrons
Which of the following statements represents properly the element which is located in period 3, group (VIIA) in the modern periodic table …….?
Forms an ion whose charge is +1
One of d-block elements
Its valence shell contains 5 electrons
A representative element which is located below fluorine 9F
which of the following elements differs in the electronic configuration of its valence shell from the other elements in its group? …………..
36Kr
22K
4Be
2He
The elements which follow neon gas are located in the ……… period.
First
Second
Third
fourth
How many unpaired electrons are there in the ground state electronic configuration of an atom of aluminum?
4 unpaired electrons
1 unpaired electron
3 unpaired electrons
2 unpaired electrons
Which atomic feature do elements in the same period of the periodic table contain an equal number of?
Electron shells
Neutrons
Electrons
Protons
If the atomic radius of rubidium is 235pm, what is its ionic radius (rounded to the nearest integer)?
148 pm
253 pm
275 pm
300 pm
Which of the following statements does not in part explain why the melting point of the period 3 elements increases from Na to Al?
From Na to Al, the charge on the metal ion decreases from 3+ to 1+
The number of delocalized electrons increases from Na to Al
The strength of the metallic bonding increases
All three elements are metals, so they exhibit metallic bonding
Which of the following represents the proper graduation?
Electron affinity (17Cl < 8C < 9F)
Ionization potential (19K < 12Mg < 13Al)
Atomic radius (33As < 15P < 14Si)
Ionic radius (12Mg2+ < 20Ca2+ < 19K+)
In the same period, the element which gains electrons during the chemical reactions is characterized by ………...
Lower electron affinity
Higher electronegativity
Lower first ionization potential
Larger atomic radius
Which of the following atoms has the greatest electron affinity?
Cs
Rb
Na
K
Which of the following elements has the largest atomic radius across the periodic table?
Copper
Cesium
Lithium
Neon
Which of the following group 17 elements has the largest atomic radius?
Fluorine
Chlorine
iodine
bromine
Which of the following is not correct about the elements of group 1A?
They are characterised by their large atomic radii.
They are characterised by their high electron affinity
They are characterised by their low first ionisation energy.
They are characterised by their low electronegativity
Which of the following elements has an electron affinity that is very close to zero?
Neon
Beryllium
Nitrogen
All of the answers are correct
