Write a note on the position of elements in the periodic table? [5 MARKS]
Write a note on the position of elements in the periodic table? [5 MARKS]
Each point: 1 Mark
1. The elements which are placed on the left-hand side (except hydrogen) and in the centre of the periodic table are called metals. Such as sodium, potassium, magnesium, calcium, iron, copper, zinc etc.
2. The elements which are placed on the right-hand side of the periodic table are called non-metals such as oxygen, nitrogen, chlorine, fluorine etc.
3. The metals and non-metals are separated from each other in the periodic table by a zig-zag line.
4. The elements placed in the zig-zag line show some properties of metals and some properties of non-metals and are called metalloids such as boron(B), silicon(Si), germanium(Ge), arsenic(As), antimony(Sb), tellurium(Te) and polonium(Po).
5. Metals present at the extreme left are known as light metals, while those which are present in the centre of the periodic table are called heavy metals or transition metals.
Each point: 1 Mark
1. The elements which are placed on the left-hand side (except hydrogen) and in the centre of the periodic table are called metals. Such as sodium, potassium, magnesium, calcium, iron, copper, zinc etc.
2. The elements which are placed on the right-hand side of the periodic table are called non-metals such as oxygen, nitrogen, chlorine, fluorine etc.
3. The metals and non-metals are separated from each other in the periodic table by a zig-zag line.
4. The elements placed in the zig-zag line show some properties of metals and some properties of non-metals and are called metalloids such as boron(B), silicon(Si), germanium(Ge), arsenic(As), antimony(Sb), tellurium(Te) and polonium(Po).
5. Metals present at the extreme left are known as light metals, while those which are present in the centre of the periodic table are called heavy metals or transition metals.
