Question

Fill in the blanks with the choices given in brackets:
Hi) The molecular formula of Aluminium Oxide is
(AlO3/Al2O3)
ii) The vertical columns in the periodic table are
(groups/
periods),
cliii) Group II metals are called
metals. (alkali/ alkaline earth)
((iv) According to the modern Periodic Law, physical and chemical properties
of element are periodic functions of their
(atomic weight!
atomic numbers).
V) A carbonate that does not decompose on heating is
(K2CO31
CaCO3).​

Answer 1

Answer:

i)Al₂O₃

Al³⁺     O²⁻

by criss cross method,

we get as Al₂O₃

ii)Groups

iii)alkaline earth metals

iv)atomic numbers

v)K2CO3

Answer 2

Answer:

i) Al2co3

ii) Groups

iii) alkaline earth metal

iv) atomic number

v)K2CO3

HOPE IT WILL HELPFUL FOR YOU