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), there is an increase in reactivity. This is because sodium has one more electron in its outermost energy level than neon. The outermost electron in sodium is loosely held and easily lost, making it more reactive. Additionally, the increase in atomic number brings a greater positive charge in the nucleus of the sodium atom, attracting the outermost electron less strongly and making it more likely to be involved in chemical interactions.
