Question

The two elements A and B A are in the second class and B is in the 17th class. What will be the value of the compounds produced in them​

Answer 1

Answer:

1A 2A 3A 4A 5A 6A 7A 8A

(1) (2) (13) (14) (15) (16) (17) (18)

3B 4B 5B 6B 7B — 8B — 1B 2B

(3) (4) (5) (6) (7) (8) (9) (10) (11) (12)

1 H He

2 Li Be B C N O F Ne

3 Na Mg Al Si P S Cl Ar

4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr

5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

6 Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

7 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Uub — Uuq — — — —

6 Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu

7 Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A. The name comes from the fact that the oxides of these metals produced basic solutions when dissolved in water, and they remained solids at the temperatures available to the ancient alchemists. Like the Group 1A elements, the alkaline earth metals are too reactive to be found in nature in their elemental form.