Plz do.. this
Dear student,
1.
(c) They have 13 valence electrons.
All the metals have 13 electrons in their valence shell and they lose their valence electrons to form positive ions. However, other properties like hardness, high melting and boiling points, malleability and ductility are not shown by all metals. Even though sodium and potassium are solids, they are soft, non-malleable and non-ductile metals. Further, they have low melting and boiling points. Similarly, mercury is found in liquid state at room temperature.
2.
in the given options sodium is most reactive. (option d)
3.
Duralium is an alloy of aluminum that is light as well as strong, this is used to construct the bodies of air-craft. (option c)
4.
Reactivity series;
Al>Zn> Fe>Pb> H>Cu
so in the given options,
Zinc is more reactive than the rest of them, so it can displace them from their salt solution
(option d )
5.
A is more reactive than B, thus it can displace less reactive metal from the salt solution
So, A is more reactive than B (option a)
6.
The metal reacts with oxygen to form the basic oxides. (option b)
7.
In the construction industry, steel (an alloy of carbon and iron) is used widely due to its strength
Iron (option a)
Regards,
1.
(c) They have 13 valence electrons.
All the metals have 13 electrons in their valence shell and they lose their valence electrons to form positive ions. However, other properties like hardness, high melting and boiling points, malleability and ductility are not shown by all metals. Even though sodium and potassium are solids, they are soft, non-malleable and non-ductile metals. Further, they have low melting and boiling points. Similarly, mercury is found in liquid state at room temperature.
2.
in the given options sodium is most reactive. (option d)
3.
Duralium is an alloy of aluminum that is light as well as strong, this is used to construct the bodies of air-craft. (option c)
4.
Reactivity series;
Al>Zn> Fe>Pb> H>Cu
so in the given options,
Zinc is more reactive than the rest of them, so it can displace them from their salt solution
(option d )
5.
A is more reactive than B, thus it can displace less reactive metal from the salt solution
So, A is more reactive than B (option a)
6.
The metal reacts with oxygen to form the basic oxides. (option b)
7.
In the construction industry, steel (an alloy of carbon and iron) is used widely due to its strength
Iron (option a)
Regards,