Why There Are No Pure Elements From Group 1 & 7
Group 1 elements are alkali metals which are very soft and reacts with metals well. The elements reacts very strongly with water. As you down the elements of group one, the reactivity increases. However, group 7 are halogens which are reactive, but they are metal. They are also different from group one as their reactivity decreases as you go down. Also, the elements becomes darker as you go down the group.
Chemical reactions of group 1:
The group 1 alkali metals are very reactive when put in water, as it produces hydrogen gas and alkaline solution (alkali metal hydroxide). The alkali metals reacts very fast and violent with water, as when you place the metals (lithium, sodium or potassium) …show more content…
The size of the atoms get bigger and bigger, as you can see in the diagrams of group 1 elements on the right. Therefore, when the atom size increases, then the outer electron will be further away from the positive nucleus in the middle. This means that they get weaker when you go down the group. For example, lithium is stronger than sodium, as the positive nucleus is closer to the outer electron. As you go down the group the electron is further away from the nucleus and therefore, francium is the weakest out of all the alkali metals in group 1 and lithium is the strongest. As they become weaker when you go down the group, the outer electron is more easy to loose when you place the alkali metals in the …show more content…
Alkali mets need to loose one electron to make them stable. Therefore, they react with halogen and they tend to loose one electron of the outer shell and it form ions with a single positive charge. This means, halogens will gain one and will make them more stable. Once they are attracted towards each other, they become an ionic compound. Therefore, positive and negative ions are attracted to each other, leading them to bind together. For example, sodium chloride is an example of ionic compound, where the sodium is positive and chloride is negative: Na+ +
Group 1 elements are alkali metals which are very soft and reacts with metals well. The elements reacts very strongly with water. As you down the elements of group one, the reactivity increases. However, group 7 are halogens which are reactive, but they are metal. They are also different from group one as their reactivity decreases as you go down. Also, the elements becomes darker as you go down the group.
Chemical reactions of group 1:
The group 1 alkali metals are very reactive when put in water, as it produces hydrogen gas and alkaline solution (alkali metal hydroxide). The alkali metals reacts very fast and violent with water, as when you place the metals (lithium, sodium or potassium) …show more content…
The size of the atoms get bigger and bigger, as you can see in the diagrams of group 1 elements on the right. Therefore, when the atom size increases, then the outer electron will be further away from the positive nucleus in the middle. This means that they get weaker when you go down the group. For example, lithium is stronger than sodium, as the positive nucleus is closer to the outer electron. As you go down the group the electron is further away from the nucleus and therefore, francium is the weakest out of all the alkali metals in group 1 and lithium is the strongest. As they become weaker when you go down the group, the outer electron is more easy to loose when you place the alkali metals in the …show more content…
Alkali mets need to loose one electron to make them stable. Therefore, they react with halogen and they tend to loose one electron of the outer shell and it form ions with a single positive charge. This means, halogens will gain one and will make them more stable. Once they are attracted towards each other, they become an ionic compound. Therefore, positive and negative ions are attracted to each other, leading them to bind together. For example, sodium chloride is an example of ionic compound, where the sodium is positive and chloride is negative: Na+ +