Q2 M1 - ELECTRIC STRUCTURE OF MATTER

On the basis of Rutherford’s model of an atom, which sub-atomic particle is present in the nucleus of an atom?

• proton only
• proton and electron
• proton and neutron
• neutron and electron

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
• raisin bread model
• planetary model
• quantum mechanical model

Which electron transition results in the emission of energy?

• 1s to 2s
• 2s to 2p
• 3p to 3s
• 3p to 4p

The symbol “n” in the Bohr theory of atomic structure refers to the _______

• energy of electron
• total energy of the atom
• orbit in which an electron is found
• number of electrons in the energy level

Which of the following sublevels is correctly designated?

• 1p5
• 2p6
• 3f9
• 3d11

How many orbitals are in the third principal energy level?

• 3
• 6
• 9
• 12

Which configuration is possible in an excited state of an electron?

• 1H: 1d1
• 11Na: 1s2 2s2 2p6 3d1
• 2He: 1s2
• 10Ne: 1s2 2s2 2p5 3s1

What are the orbitals in the fifth principal energy level?

• s orbital
• s, p orbitals
• s, p, d orbitals
• s, p, d, f, and g orbitals

For a neutral atom with the electron configuration of 1s2 2s2 2p5 3s1, which statement is FALSE?

• The atomic number is ten.
• The atom is in ground state.
• The atom is in an excited state.
• The 1s and 2s orbitals are filled.