What are group 1 and 7 elements called?
The halogens
The halogens typically form ionic compounds with elements in group 1 which have one outer electron that the group 7 elements can’t resist taking.
What is the difference between group 1 and group 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 group 7 elements called?
the halogens
The Group 7 elements are called the halogens. They are placed in the vertical column, second from the right, in the periodic table . Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals.
What is the reactivity of group 1 and 7?
The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group. This is the opposite trend to that seen in the alkali metals in Group 1 of the periodic table . Fluorine is the most reactive element of all in Group 7.
How does the group 0 elements reactivity differ from that of groups 1 and 7?
atoms of group 1 and 7 elements have incomplete outer shells (so they are reactive ) atoms of group 0 elements have complete outer shells (so they are unreactive)
Why are the reactivity trends for group 1 and 7 different?
Group 7 elements are less reactive down the group because the electron shells have a repulsive effect on the reacting electron, which weakens the force of electrostatic attraction between it and the positive nucleus.
What are the group 1 elements called?
the alkali metals
Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Why do atoms in group 1 and 7 react with each other?
The atoms of all group 1 elements have similar chemical properties and reactions because they all have one electron in their outer shell. Similarly, the atoms of all group 7 elements have similar chemical properties and reactions to each other, because they all have seven electrons in their outer shell.
What are special about group 1 group 7 and group 0 elements?
You should see that: atoms of group 1 and 7 elements have incomplete outer shells (so they are reactive ) atoms of group 0 elements have complete outer shells (so they are unreactive)
What do elements in group 7 have in common?
Elements in group seven have a number of similar properties, most importantly they have low melting and boiling points. This is of course a typical property of non-metals. From the lowest boiling and melting point to the highest, the group in order is fluorine, chlorine, bromine, iodine and astatine.
Why are Group 7 elements called halogens?
Halogen means ‘salt-forming compounds’. Group 7 elements when they react with metal forms salt, hence the name halogen.