giant covalent structures

Question 1

how are all the atoms bonded to each other in giant covalent structures?

Answer 1

by strong covalent bonds

Question 2

why do giant covalent structures have high melting and boiling points?

Answer 2

lots of energy is needed to break the covalent bond bonds between the atoms

Question 3

why don’t giant structures conduct electricity?

Answer 3

the don’t contain charged particles

Question 4

how many atoms is each atom bonded to in diamond?

Answer 4

4

Question 5

how many atoms is each atom bonded to in graphite?

Answer 5

3

Question 6

what shape do atoms in graphite form?

Answer 6

hexagon

Question 7

how many delocalised electrons do each carbon atoms have?

Answer 7

one

Question 8

what two atoms is silicon dioxide made from?

Answer 8

oxygen and silicon

Question 9

what is silicon dioxide also known as?

Answer 9

silica

Question 10

what is made from silica?

Answer 10

sand

Question 11

melting/boiling point of giant covalent structures

Answer 11

very high

Question 12

list 4 properties of silica

Answer 12

-hard substance
-high melting/boiling points
-insoluble in water
-doesn’t conduct electricity

Question 13

what are macromolecules?

Answer 13

huge network of atoms connected by bonds to form a giant structure

Question 14

what is silica used for?

Answer 14

-lining in furnaces
-found as quartz in granite
-sand made of it

Question 15

describe how the atoms are bonded together in silica

Answer 15

-each silicon atom covalently bonded to 4 oxygen atoms
-each oxygen atom covalently bonded to 2 silicon atoms
-no intermolecular forces