periodicity

Question 1

atomic radius

Answer 1

distance between the nucleus and the outermost electron of an atom

Question 2

ionic radius

Answer 2

distance between the nucleus and the outermost electron of an ion

Question 3

first ionisation energy

Answer 3

energy required to remove one mole of electron from one mole of gaseous atom to form one mole of gaseous positive ion

Question 4

why is Al2O3 insoluble in water?

Answer 4

the oxide layer protects it from corrosiob

Question 5

acidic and basic nature of period 3 oxide (Na2O, MgO, Al2O3, SiO2, P4O10, SO2 SO3

Answer 5

• basic
• basic
• amphoteric
• acidic
• acidic
• acidic

Question 6

intermolecular forces

Answer 6

forces between molecules

Question 7

intramolecular forces

Answer 7

within a molecule

Question 8

electrical conductivity

Answer 8

how well a substance can conduct electricity

Question 9

cations

Answer 9

loses their valence electrons and smaller than parent atom

Question 10

anions

Answer 10

gains one or more electrons in their third quantum shell and larger than parent atom

Question 11

bonding of period 3 elements (Na, Mg, Al, Si, P, S, Cl

Answer 11

• metallic
• metallic
• metallic
• covalent
• covalent
• covalent
• covalent

Question 12

structure of period 3 elements (Na, Mg, Al, Si, P, S, Cl, Ar

Answer 12

• giant metallic
• giant metallic
• giant metallic
• giant molecular
• simple molecular
• simple molecular
• simple molecular
• simple molecular