Pick up the statements which are related with carbon:
1. 14th group element.
2. In the human body, it is second most abundant element by mass after oxygen.
4. 15th group element.
5. One of the few elements known since antiquity.
6. Only 4 electrons are available for bonding.
7. Only 3 electrons are available for bonding.
Carbon is member of group 14 on the periodic table; it is non-metallic and tetravalent—making four electrons available to form covalent chemical bonds.
Carbon is present in all forms of carbon-based life, and in the human body carbon is the second most abundant element by mass (about 18.5%) after oxygen.
Carbon is one of the few elements known since antiquity.