What happens to Group 1 electrons when they react?
Group 1 metals all have one electron in their outer shell.
When they react they form positive metal ions by losing this electron.
This means that the electrostatic forces of attraction between the outer shell electron and the nucleus are weaker and therefore it takes less energy for the electron to be lost..
Why does melting point decrease as you go down Group 1?
Both the melting and boiling points decrease down the group. … The decrease in melting and boiling points reflects the decrease in the strength of each metallic bond. The atoms in a metal are held together by the attraction of the nuclei to electrons which are delocalized over the whole metal mass.
Does density increase down Group 1?
The densities of the Group 1 elements increase down the group (except for a downward fluctuation at potassium). … Atomic radius increases down a group, so the volume of the atoms also increases. Fewer sodium atoms than lithium atoms, therefore, can be packed into a given volume.
What happens as you go down Group 7?
The reactivity of Group 7 elements decreases down the group. … The electrons in the outer shell move further away from the nucleus as we go down the group and the attraction force between the electrons and the nucleus become weaker and weaker. This weaker attraction in the larger atoms makes it harder to gain electron.
Why is Group 1 more reactive as you go down?
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.
Why do all atoms in Group 1 have a +1 charge?
Atoms with incomplete outer electron shells are unstable. By either gaining or losing electrons, atoms can obtain full outer electron shells and become stable. Metals in group 1 have 1 electron in their outer shell. They lose this 1 electron to form ions with a +1 charge.