Answer:
1.D.Nonmetal are not ductile
2.B.lanthanides and actinides
3.C.alkali metals
Explanation:
1.Non- metal:It is that element which gain of electrons and makes negative ion.
Non- metals do not conduct electricity.
Non-metal are soft and not shiny.
Non- metals are not malleable and not ductile.
Answer:D.Non metals are not ductile.
2.Transition metal: It is that metal which show variable oxidation states.
Transition metal forms compound.
The elements of transition metal have completely filled or half filled d- orbitals.
Inner transition metals: The two bottom rows in periodic table are lanthanides and actinides called Inner transition metals.
Answer:B.Lanthanides and actinides
3.Alkali metals:The elements of group 1 are lithium, sodium,potassium cesium , rubidium and francium are called alkali metals.
These elements contain one electron in their outermost shell.
The valency of the element of this group is +1 .
Answer.C.Alkali metals
1. The sentence which describes one characteristic of nonmetals is: D. Nonmetals are not ductile.
2. The inner transition metals are composed of: B. lanthanides and actinides.
3. The group that sodium, potassium, and cesium belong to is: C. alkali metals.
A nonmetal can be defined as a chemical element that has a finite band gap (activation energy) with respect to electron conduction and as such do not conduct electricity or produce heat.
Basically, a nonmetal gains electrons when it reacts with a metal.
Some of the characteristics of nonmetals are:
A transition metal can be defined as a chemical element that has a partially filled d-orbital or is capable of producing cations with an incomplete d-orbital (subshell).
The inner transition metals are composed of lanthanides and actinides, which are chemical elements with atomic number (number of protons) of 57 - 71 and 89 - 103 on the periodic table respectively.
Alkali metals can be defined as the monovalent chemical elements that are found in Group IA of the periodic table.
Generally, these group of chemical elements readily lose their single (one) valence electron to form ionic compounds with non-metals. Some examples of alkali metal are:
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