chem test

Question 1

what are the three types of strong chemical bonds?

Answer 1

->ionic
->covalent
->metallic

Question 2

For ionic bonding the particles are…..

Answer 2

oppositely charged ions

Question 3

For covalent bonding the particles are…..

Answer 3

atoms which share pairs of electrons.

Question 4

For metallic bonding the particles are…..

Answer 4

atoms which share delocalised electrons

Question 5

where does ionic bonding occur?

Answer 5

Ionic bonding occurs in compounds formed from metals combined with non-metals.

Question 6

where does metallic bonding occur?

Answer 6

Metallic bonding occurs in metallic elements and alloys.

Question 7

where does covalent bonding occur?

Answer 7

Covalent bonding occurs in most non-metallic elements and in compounds of non-metals.

Question 8

Describe ionic bonding:

Answer 8

->When a metal atom reacts with a non-metal atom
->electrons in the outer shell of the metal atom are transferred.
->Metal atoms lose electrons to become positively charged ions. ->Non-metal atoms gain electrons to become negatively charged ions.

Question 9

Describe a giant ionic compound

Answer 9

->Giant ionic compounds have regular structures
->in which there are strong electrostatic forces
->in all directions
->between oppositely charged ions
->in the lattice

Question 10

Name an example of a gaint ionic compound

Answer 10

->sodium chloride

Question 11

limitations of models

Question 15

Describe covalent bonding

Answer 15

->A covalent bond
->is a strong bond
->involving two non-metal atoms
->sharing pairs of electrons.

Question 16

what are the three forms of covalent bonding?

Answer 16

->simple molecules
->polymers
->giant structures

Question 17

what are the three types of covalent bonds?

Answer 17

->single
->double
->triple

Question 18

Draw dot and cross diagrams for the molecules of hydrogen, chlorine, oxygen, nitrogen, hydrogen chloride, water, ammonia and methane

Answer 18

check answer in AQA textbook