Question

1. metallic character/reactivity

a) define metallic character:
b) metallic character/reactivity ______________ from left to right.
c) metallic character/reactivity ______________ from top to bottom.
d) which of the following atoms is the most metallic?
be fr he c k o
e) which of the following atoms is least likely to lose electrons in a chemical reaction?
ca al f si ba s
f) which of the following atoms is most conductive?
rb b be ne na n

Explanation:

a) Metallic character refers to the ability of an element to lose electrons and form positive ions.
b) Metallic character decreases from left to right across a period in the periodic table. This is because as you move from left to right, the atomic number increases, and the number of protons in the nucleus increases. This leads to a greater attraction for the electrons, making it more difficult for the atoms to lose electrons.
c) Metallic character increases from top to bottom within a group in the periodic table. As you go down a group, the atomic radius increases. The outermost electrons are further from the nucleus and are less strongly attracted, so they are more easily lost.
d) Francium (Fr) is the most metallic among the given atoms. It is in Group 1 (alkali metals) and is at the bottom of the group, so it has a large atomic radius and easily loses its outermost electron.
e) Fluorine (F) is least likely to lose electrons. Fluorine is a non - metal in Group 17. Non - metals have a high electronegativity (tendency to gain electrons) and are not likely to lose electrons in a chemical reaction.
f) Rubidium (Rb) is the most conductive. Metals are good conductors of electricity. Rubidium is an alkali metal (Group 1). Among the given options, Rb has the metallic properties that make it a good conductor (delocalized electrons for electrical conduction).

Answer:

a) The ability of an element to lose electrons and form positive ions.
b) Decreases
c) Increases
d) Fr
e) F
f) Rb