The elements of Group IV A (also known as Group 14) are carbon (C), silicon (Si), germanium (Ge), tin (Sn), and lead (Pb). These elements are called the carbon family.
The chalcogen family (Group 16) includes oxygen, sulfur, selenium, tellurium, and polonium.
The nitrogen family (Group 15) includes nitrogen, phosphorus, arsenic, antimony, and bismuth.
The boron family (Group 13) includes boron, aluminum, gallium, indium, and thallium.
Which of the following Statements are NOT true about the periodic table?
A. The properties of elements are a function of atomic weights.
B. The properties of elements are a function of atomic numbers.
C. Elements having similar outer electronic configuration are arranged in the same period.
D. An element's location reflects the quantum numbers of the last filled orbital.
E. The number of elements in a period is the same as the number of atomic orbitals available in the energy level that is being filled.
Match List-I with List-II:
Match the LIST-I with LIST-II.
| LIST-I | LIST-II | ||
| A. | Pnicogen (group 15) | I. | Ts |
| B. | Chalcogen (group 16) | II. | Og |
| C. | Halogen (group 17) | III. | Lv |
| D. | Noble gas (group 18) | IV. | Mc |
Choose the correct answer from the options given below :
Which of the following statements are correct?
A. The process of the addition an electron to a neutral gaseous atom is always exothermic
B. The process of removing an electron from an isolated gaseous atom is always endothermic
C. The 1st ionization energy of the boron is less than that of the beryllium
D. The electronegativity of C is 2.5 in $ CH_4 $ and $ CCl_4 $
E. Li is the most electropositive among elements of group 1
Choose the correct answer from the options given below