chem

Question 1

what is an ionic lattice

Answer 1

a repeating pattern of oppositely charged ions

Question 2

what is a covalent bond

Answer 2

when elements share electrons

Question 3

Bonding in magnesium ( metals)

Answer 3

metals have metallic bonding in which they lose electrons to gain positive ions ( cations) and there is a strong electrostatic between the cations and the oppositely charged delocalized electrons

Question 4

Bonding in silicon ( non metals in general)

Answer 4

Covalent bonding so electrons are being shared - 2 atoms share a pair of electrons

Question 5

properties of ionic lattices

Answer 5

• high boiling points , electrical conductivity when molten
  giant structures, hard/brittle , insulators in solid form

Question 6

properties of giant covelent structures

Answer 6

• high boiling/melting points
  no electrical conductivity

Question 7

what is the independent variable

Answer 7

a factor that is changed during the experiment to see the effect it has on another factor

Question 8

why do the different isotopes of the same element have the same chemical properties

Answer 8

as they have the same number of electrons on the outer shell

Question 9

what is resolution

Answer 9

the smallest value you can read on a burette