..........................................BONDING

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Q.1: What is an orbital?

Q.2: What is an electron configuration of an atom?

Q.3: What is the first ionization potential of an atom?

Q.4: What is an electron affinity?

Q.5: What is electronegativity?

Q.6: When covalent bonds are formed between two atoms?

Q.7: What is the excited state of an atom?

Q.8: What is the Bohr model of the hydrogen atom?

Q.9: What is the wave mechanical model of the atom?

Q.10: What is the Pauli exclusion principle?

Q.11: What are valence electrons?

Q.12: What is the Lewis structure?

Q.13: What is resonance?

Q.14: What is a metallic bond?

Q.15: What is hybridization?

Q.16: What is a sigma bond?

Q.17: What is a pi bond?

Q.18: The distance from trough of one wave to the trough of the next wave is called -------- .

Q.19: A discrete particle of energy is called a(n) --------- .

Q.20: A quantum of light energy is called a(n) ----- .

Q.21: Einstein proposed a relation between --------- and ------- .

Q.22: When all of the electrons in an atom are in the lowest available energy levels, the atom is in the ----------- ---------- .

Q.23: The energy of an emitted photon corresponds to the difference in energy between the excited state of the emitting atom ansd its -------- state.

Q.24: The portion of the electromagnetic spectrum between the wavelengths of approximately 400 and 700 nanometers is called the ------- region.

Q.25: The energy levels of an atom are --------.

Q.26: Electrons found in the outermost principal energy level of an atom are referred to as -------- electrons.

Q.27: An element with partially filled d orbitals is called a(n) -------- .

Q.28 A(n) --------- bond requires the complete transfer of an electron from one atom to another.

Q.29 If one atom of a covalent bond attracts electrons more stronly towards itself than does the second atom, the bond will be --------- .

Q.30 The relative polarity of a bond is determined by the difference in -------- of the atoms forming the bond.

Q.31: Cis and trans isomers are an example of ---------- isomerism.

Q.32: In water molecule the bond between H and O is --------- covent bond.

Q.33: When polar molecules or negative ions cluster around a central positive ion, a --------- -------- is formed.

Q.34: The polar molecules or negative ions that cluster around a central positive ion are known as --------.

Q.35: If a covalent bond is formed in which both of the electrons in the shared pair come from the same atom,the bond is known as ---------- covalent.

Q.36: The photons from the sun which provide us with warmth are
(A) in the visible spectrum
(B) infrared rays
(C) cosnmic rays
(D) ultraviolet rays
Select the labelled statement that best fits your answer.

Q.37: An excited electron of hydrogen emits the least energy when it drops from quantum levels
(A) 4 to 1
(B) 5 to 1
(C) 2 to 1
(D) 5 to 2
Select the labelled statement that best fits your answer.

Q.38: A p orbital is best described as
(A) a cube
(B) a sphere
(C) dumbbell
(D) too complicated to describe
Select the labelled statement that best fits your answer.

Q.39: 1s 2 2s2 2px1 2py1 is the electron configuration of
(A) carbon
(B) helium
(C) lithium
(D) silicon
(E) nitrogen
Select the labelled statement that best fits your answer.

Q.40: 1s2 2s2 2p6 3s2 3p4 is the electron configuration of an atom of the given element. How many orbitals are half-filled in that atom in the ground state?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 6
Select the labelled statement that best fits your answer.

Q.41: Multiple covalent bonds exist in
(A) Cl2
(B) N 2
(C) F 2
(D) H 2
Select the labelled statement that best fits your answer.

Q.42: When two atoms share two pairs of electrons, the bond that will exist between them will be
(A) ionic
(B) single
(C) double
(D) triple
Select the labelled statement that best fits your answer.





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