graduation of element propetries (to metallic property)

............ is the ability of the atom in covalent molecule to attracts the electrons of the chemical bond towards itself.

the element ₁₉k has atomic size ................. that of the element ₂₀Ca

• smaller than

• larger than

• equal to

choose all the possible answers:

what of the following molecules are pure compounds.

• water H2O

• hydrogen H2

• chlorine Cl2

• Hydrochloric acid HCl

the measuring unit of atomic radius is .........

the element 13Al is consider as ..............

• metal

• non-metal

• metalloid

• noble gas

each period in the modern periodic table starts with .................

• metal

• non-metal

• metalloid

• noble gas

................. is the lowest metallic element in group (1A).

• 11Na

• 55Cs

• 19K

• 3Li

By increasing the atomic number in same group, the non-metallic property .............

By increasing the atomic number in the same period, the atomic size .................. therefor the metallic property ...............

the gas that evolved when Mg react with dilute acid HCl is ............