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WorksheetsElectronic Structure of Matter
Total questions: 20
Worksheet time: 10mins
On the basis of Rutherford's Model of an atom, which sub-atomic particle is present in the nucleus of an atom.
proton and electron
neutron and electron
proton and neutron
proton only
if the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom?
6
8
10
18
Which atomic model is proposed by Schrodinger?
nuclear model
planetary model
raisin bread model
quantum mechanical model
Which electron transition results in the emission of energy?
3p to 3s
3p to 4p
2s to 2p
1s to 2s
The symbol "n" in the Bohr theory of atomic structure refers to
the energy of electron
the total energy of the atom
the number of electron in an energy level
the orbit in which an electron is found
Which of the following sublevels is correctly designated?
1p5
3f9
2p6
3d11
How many orbitals are in the third principal energy level?
3
6
9
2
Which configuration is possible in an excited state of electron?
2He:1s2
1H:1d1
11Na:1s2 2s2 2p6 3d1
10Ne: 1s2 2s2 2p5 3s1
What are the orbitals present in the fifth principal energy level?
s orbital
s,p orbital
s,p,d orbitals
s, p, d, and f orbitals
For a neutral atom with the electron configuration of 1s2 2s2 2p5 3s1 which statement is false?
the atomic number is ten
the 1s and 2s orbitals are filled
the atom is in the ground state
the atom is in the excited state
Who proposed the probability that electrons will be found in certain locations around the nucleus of an atom?
Neils Bohr
Erwin Schrodinger
Ernest Rutherford
J.J. Thomson
Which of the following statements is NOT true of the atomic model of Bohr?
The hydrogen is made up of a positively charged nucleus
The electron revolves around the nucleus in a circular orbit
The energy of the electron in a given orbit is not fixed
An electron can absorb or emit a quantity of radiation
Which orbital designation has the highest energy?
2s
2p
3d
4s
Orbital is a region in an atom where electron can be found.
TRUE
FALSE
An electron can absorb energy when it jumps into a higher energy level.
TRUE
FALSE
An electron can emit energy when it jumps to a higher energy level.
TRUE
FALSE
Filling of electrons in an atom starts from a low energy level to the highest energy level.
TRUE
FALSE
What occurs when an electron moves from high energy level to a low one?
Another electron goes from a low energy level to a high one
The atom moves faster
Colored light is given off
This process is not possible
Which combination describes the flame color of the compound when heated
sodium chloride - orange
copper (II) sulfate - violet
potassium chloride - blue
boric acid - red
Which combination describes the flame color of the compound when heated
sodium chloride - green
copper (II) sulfate - orange
potassium chloride - violet
boric acid - red
