Tag: metallic bonding

Questions Related to metallic bonding

Metallic bond is formed by sharing of electrons between ______.

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. Two atoms

  2. Many atoms

  3. Three atoms

  4. Four atoms

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Correct Option: B
Explanation:

Metallic bond is formed by sharing of electrons between many atoms A metallic bond is pretty different from covalent and ionic bonds, but the goal is the same: to achieve a lower energy state. Instead of a bond between just two atoms, a metallic bond is a sharing of electrons between many atoms of a metal element. Hence option B is correct.

Iron is tougher than sodium because :

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. iron atom is smaller

  2. iron atoms are more closely packed

  3. metallic bonds are stronger in iron

  4. none of these

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Correct Option: C
Explanation:
Iron is tougher than sodium because metallic bonds are stronger in iron.
Stronger is metallic bonding (FeFe has dd -subshell), more is hardness.

Hence, it is hard than Sodium like other alkali metals are soft.

So, the correct option is $C$

A solid which is transparent to visible light and whose electrical conductivity decreases with increase in temperature is formed by:

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. Ionic bonding

  2. Metallic bonding

  3. Covalent bonding

  4. Van der Waals bonding

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Correct Option: C

A metallic bond differs form a covalent bond in that:

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. it is not directional

  2. it is not saturable

  3. the valence electrons are not attached to any particular atom

  4. all of the above

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Correct Option: D
Explanation:

Metallic bond is the force of attraction between many valence electrons and positive ions such that a single electron is attracted by many positive ions (also known as kernel). Hence it is non-directional and non-saturable.


Whereas covalent bond is formed by sharing of valence electrons between two particular atoms which makes it directional as well as saturable.

The type of bond between atoms of calcium in a crystal of calcium is:

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. Hydrogen bond

  2. Ionic bond

  3. Polar covalent bond

  4. Pure covalent bond

  5. Metallic bond

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Correct Option: E
Explanation:

The type of bond between atoms of calcium in a crystal of calcium is Metallic bond.
Metallic solids are the crystalline solids formed by atoms of the same metallic element. The bonding electrons are delocalised over entire crystal lattice and can move freely from one end to other. These bonding electrons forms sea of electrons whereas metal ions form a kernel. Metallic bond is the electrostatic attractive force between positively charged metallic ions and negatively charged delocalised electrons.

Metallic bonding is explained by:

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. electron sea model

  2. band model

  3. both A and B

  4. none of these

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Correct Option: C
Explanation:

In contrast to electrons that participate in both ionic and covalent bonds, electrons that participate in metallic bonds delocalize, forming a sea of electrons around the positive nuclei of metals. The availability of "free" electrons contributes to metals being excellent conductors.

Which of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. Metallic bonding

  2. Ionic bonding

  3. Covalent bonding

  4. Van der Waals bonding

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Correct Option: A
Explanation:

Metals (metallic bonds) have these physical properties- 


1) Metals reflect the photons of the visible spectrum (light) falling on their surface, thus metals are often silver-white or greyish with the characteristic specular reflection of metallic lustre.

2) The electrical conductivity of metals decreases with a rise in temperature.
3) Metals have a high melting point.

A  4 : 1 mixture of helium and methane is contained in vessel at 10 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. The composition of mixture effusing out initially is

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. 8:1

  2. 8:5

  3. 1:8

  4. 5:8

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Correct Option: A

Which of the following properties are because of presence of metallic bonding in metal atoms :

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. Electrical conductivity

  2. Malleability

  3. Ductility

  4. All of the above 

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Correct Option: D
Explanation:

Many of the characteristic properties of metals are attributable to the non-localized or free-electron character of the valence electrons. This condition, for example, is responsible for the high electrical conductivity of metals. The valence electrons are always free to move when an electrical field is applied. The presence of the mobile valence electrons, as well as the nondirectionality of the binding force between metal ions, account for the malleability and ductility of most metals. When a metal is shaped or drawn, it does not fracture, because the ions in its crystal structure are quite easily displaced with respect to one another. Moreover, the nonlocalized valence electrons act as a buffer between the ions of like charge and thereby prevent them from coming together and generating strong repulsive forces that can cause the crystal to fracture.
Hence option D is correct.

Metals lose electrons from their lattice to become :

bonding in metals metallic bonding chemical bonding and structure chemical bonding and molecular structure chemistry

  1. alkalis

  2. positive ions

  3. non-metals

  4. negative ions

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Correct Option: B
Explanation:

A cation is formed when a metal ion loses a valence electron so as to achieve a more stable electronic configuration through this loss of an electron.