Question

Elements of modern periodic table are arrang in ---Group 2A elements are called ------ and group 7A element table are called..........., respectively, a. atomic number /Alkaline earth metals/noble gases b. atomic number /alkali metals / alkaline earth metals atomic number /Alkaline earth metals/ and halogens d. Atomic mass /alkali metals/noble gases c.

Answer 1

Answer:

c) atomic number / alkaline earth metals/ and halogens

Explanation:

Elements of modern periodic table are arrang in atomic number; for its electron configuration and its chemical properties. This arrangement shows periodic trends.

Alkaline earth metals are a group of elements that are located in group 2 of the Periodic Table and are the following: Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba) and Radio (Ra).

The Halogens are the chemical elements that form group 17 (XVII A, previously used) or group VII A of the periodic table: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and teneso (Ts)