Moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. In three to five sentences, identify the direction of the change, and give two reasons for the change.(4 points)
Moving from the element with atomic number 10 (neon) to atomic number 11 (sodium) on the periodic table, there is an increase in reactivity. This is because as we move from left to right across a period, the number of valence electrons increases, making the element more likely to form chemical bonds and react with other elements. In the case of sodium, it has only one valence electron, which makes it highly reactive and eager to lose that electron in order to achieve a stable electron configuration. Additionally, the increasing nuclear charge across a period causes a greater attraction between the nucleus and valence electrons, making it easier for sodium to lose its electron and form positive ions.
Moving from the element with atomic number 10 (neon) to atomic number 11 (sodium) on the periodic table, there is a decrease in reactivity. This means that sodium is more reactive than neon. There are two main reasons for this change. Firstly, as we move down a group on the periodic table, the atomic radius increases. This means that the outermost electron in sodium is farther away from the nucleus compared to neon, making it easier for sodium to lose its outer electron and form positive ions. Secondly, sodium has only one valence electron, whereas neon has a full valence shell. This makes sodium more likely to react with other elements in order to achieve a stable electron configuration.
Moving from the element with atomic number 10 (Neon) to atomic number 11 (Sodium) on the periodic table, there is an increase in reactivity. The change in reactivity is from being inert (non-reactive) to being highly reactive. Two reasons for this change are the increase in the number of valence electrons and the decrease in electronegativity. Neon has a full outer electron shell, making it stable and unreactive. On the other hand, Sodium has only one valence electron, which makes it highly reactive, as it tends to lose this electron to achieve a stable electron configuration. Additionally, Neon has a higher electronegativity than Sodium, meaning it attracts electrons more strongly and is less likely to lose or gain electrons compared to Sodium.
