Which periodic trend is most responsible for the trend in reactivity of alkali metals?
Which periodic trend is most responsible for the trend in reactivity of alkali metals?
The attraction from the positive nucleus to the negative electron is less. This makes it easier to remove the electron and makes the atom more reactive.
What is the trend of reactivity in the periodic table?
The farther to the left and down the periodic chart you go, the easier it is for electrons to be given or taken away, resulting in higher reactivity. Period – reactivity increases as you go from the left to the right across a period. Group – reactivity decreases as you go down the group.
How does the trend of reactivity change in the periodic table?
Period – reactivity decreases as you go from left to right. Period – reactivity increases as you go from the left to the right. Group – reactivity decreases as you go down the group.
What happens to the reactivity of the alkali metals as you go down the periodic table?
The reactivity of Group 1 elements increases as you go down the group because: the atoms get larger as you go down the group. the attraction between the nucleus and outer electron gets weaker as you go down the group – so the electron is more easily lost.
Which metal is least reactive in nature?
Silver, gold, and platinum are metals with the least reactivity. They are found in nature.
What are the two most important alkali metals?
The most common alkali metal is sodium, which is 2.8 percent of Earth’s crust. The most common sodium compound is sodium chloride (NaCl), salt. The next most common is potassium, which is 2.6 percent of Earth’s crust. The other alkali metals are much rarer.
What happens to reactivity down the group 17?
The chemical reactivity of group 17 elements decreases down the group. So down the group there is an increase in the atomic radius and hence the effective nuclear force decrease as the atomic radius increases and this leads to the decreased chemical reactivity down the group.
Which side of the periodic table is more reactive?
The elements toward the bottom left corner of the periodic table are the metals that are the most active in the sense of being the most reactive. Lithium, sodium, and potassium all react with water, for example.
Why are alkali metals kept in kerosene?
Because of their high reactivity, alkali metals must be stored under oil to prevent reaction with air.
What are periodic trends of reactivity occur with the alkali metals?
Alkali metals ( group one ) are highly reactive metals. All alkali metals have one electron in the outer shell. In a reaction, this electron is lost and the alkali metal forms a +1 ion. As you go down group 1, the number of electron shells increases – lithium has two, sodium has three etc.
How are alkali metals similar on the periodic table?
Explore the trend in reactivity down Group 1 of the Periodic Table by looking at the similarity of the physical and chemical properties of the alkali metals. These demonstrations show the similarity of the physical and chemical properties of the alkali metals and the trend in reactivity down Group 1 of the Periodic Table.
How long does it take for alkali metals to react?
These demonstrations show the similarity of the physical and chemical properties of the alkali metals and the trend in reactivity down Group 1 of the Periodic Table. The experiments take about 10–20 minutes if everything is prepared in advance.
How are the reactivity of Group 1 metals explained?
All alkali metals have one electron in the outer shell. In a reaction, this electron is lost and the alkali metal forms a +1 ion. As you go down group 1, the number of electron shells increases – lithium has two, sodium has three etc.