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Which unit is used to measure mass in the metric system
2 answers:
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Answer :
Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.
The covalent compound are usually formed when two non-metals react.
Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.
All the polyatomic ions always form an ionic compound.
Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.
For the given options:
Option A:
This compound is formed by the combination of potassium, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
Option B:
This compound is formed by the combination of magnesium, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
Option C:
Hydrogen and sulfur, both are non-metals and they will form a covalent compound.
Option D:
This compound is formed by the combination of silver, which is a metal and sulfur,
which is a non-metal. Thus, it will form an ionic compound.
Option E:
Nitrogen and chlorine, both are non-metals and they will form a covalent compound.
Option F:
This compound is formed by the combination of cobalt, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
<u>For NO3- molecule(fig.1)</u>
1. Bonds are created between elements with different electronegativity, most bonds would be polar. Bonds in NO3 are polar.
2. In the geometry of the molecule bond polarities cancel out each other (since it is a vector) so NO3- ion molecule is non polar
3. Nitrate (NO3-)ion geometry would be trigonal planar
<u>For CCl4 molecule(fig.2)</u>
1. Bonds are created between elements with different electronegativity, most bonds would be polar. Bonds in CCl4 are polar.
2. It is a completely symmetrical molecule.
3.Carbon is the centre of CCl4 have four covalent bonds and it has no lone pairs. They are all equidistant the C-Cl bond polarities cancel out. So CCl4 molecule is non polar
<u>For NH3 molecule(fig.3)</u>
1. Bonds are created between elements with different electronegativity, most bonds would be polar. Bonds in NH3 molecule are polar.
2. it has a pyramidal structure.
3. the individual N-H bond dipoles don't cancel out. This dipole moment for the molecule indicates that NH3 is a polar molecule
<u>For SF6 molecule(fig.4)</u>
1.F is more electronegative than S. So the bonds are polar.
2. The symmetry of the molecule is symmetrical so that the dipole moments of bonds cancel correspond so the molecule is non-polar.
3. it has octahedral structure
