What is the trend in Group 1?
What is the trend in Group 1?
Explaining the trend The reactivity of group 1 elements increases as you go down the group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.
What is the trend in group 7?
In group 7, the further down the group an element is, the higher its melting point and boiling point . This is because, going down group 7: the molecules become larger. the intermolecular forces become stronger.
What are the differences between group 1 and 7 elements?
As you go down group 1 (the alkali metals) in the periodic table, the elements get more reactive. As you go up group 7 (the halogens), again the elements get more reactive.
What are the trends going down Group 1?
Going down the group, the first ionisation energy decreases. There is more shielding between the nucleus and the outer electrons and the distance between the nucleus and the outer electron increases and therefore the force of attraction between the nucleus and outer most electrons is reduced.
What is the trend in melting points in group 1?
Trends in melting and boiling points When any of the Group 1 metals is melted, the metallic bond is weakened enough for the atoms to move more freely, and is broken completely when the boiling point is reached. The decrease in melting and boiling points reflects the decrease in the strength of each metallic bond.
What happens as you go down group 7?
Reactivity decreases down the group. This is because group 7 elements react by gaining an electron. As you move down the group, the amount of electron shielding increases, meaning that the electron is less attracted to the nucleus.
What is the trend in boiling points in Group 1?
Trends in melting and boiling points Both the melting and boiling points decrease down the group. When any of the Group 1 metals is melted, the metallic bond is weakened enough for the atoms to move more freely, and is broken completely when the boiling point is reached.
What is the trend of density down the group?
As we down in a group then its size increases and also volume of the atom increases as the number of electrons and protons increases. But the increase in mass is greater than that of increase in volume so the density which is defined as mass per unit volume will increase generally.
What are the trends of Group 7 elements?
Beside this, what is the trend in reactivity of Group 7 elements? The reactivity of Group 7 elements decreases down the group. Non-metal atoms gain electrons when they react with metals. When a halogen atom reacts, it gains one electron into their highest occupied energy level (outer shell) to form a singly negative charged ion.
How are Group 1 and Group 7 elements react?
Elements wants to reach the stable state of having 8 electrons in the outermost ring, so group 1 elements react by losing an electron, since they have only 1 electron in their outermost shell. Group 7 elements however have 7 electrons in their outermost shells, so they react by gaining an electron to form an outermost ring of 8 electrons.
What are the elements in Group 1, 7 and 0?
The Periodic Table –Group 1, 7 and 0 Group 0 Elements • Also called the noble gases. • Colourless gases at room temperature. • All have 8 electrons in the outer shell, apart from Helium which has 2 – stable full outer shell. • Unreactive. They are very unreactive. This means they don’t form molecules easily, so elements are found as single
Why are Group 1 and Group 7 the same?
In group 1 and 7 the 1st I.E. is the same. Its harder in Li to remove the electron then is in Cs because the last electron is closer to the Nucleus but in Cs its easier because the valance electron in Cs is much further then the nucleus thats in Li. So it dosen’t need a lot of energy to remove it.