Topic Covalent bonding the covalent challenge Outcomes 1

Topic Covalent bonding : the covalent challenge! Outcomes 1. Level GCSE (or any course for students aged 14 -16) Students are able to draw dot and cross diagrams for simple covalent molecules, including double and triple bonds This resource was contributed By Deborah Brown Instructions for teachers: this resource is fantastic, as it allows students to progress at their own rate as they draw dot and cross diagrams for covalent molecules. Start by printing off the slides 534 two-sided onto paper. You will need at least two sets depending on your class size. Lay these out around the classroom. Start by getting students to draw H 2 in their books. When they get this correct they can start the challenge and move around the room to draw dot and cross diagrams of each molecule. They can check to see if they are right by turning over the card to see the correct answer. If they are incorrect, they must correct their drawing. Students then move onto the next molecule until all have been completed. www. thescienceteacher. co. uk | resources for science teachers who like to think

F 2 HF HCl CH 4 Si. F 4 H 2 O NH 3 O 2 H 2

CO 2 SCl 2 N 2 CS 2 C 2 H 4 HCN H 2 CO Show teacher

H 2 Draw a dot and cross diagram for hydrogen. When you are correct, you can start the covalent challenge!

F 2 F F

F F Go to HF

HF H F

Go to HCl

HCl

Go to CH 4

CH 4

Go to Si. F 4

Si. F 4

F F Si F F Go to H 2 O

H 2 O

Go to NH 3

NH 3

Go to O 2

O 2

Go to CO 2

CO 2

Go to SCl 2

SCl 2

S Cl Cl Go to N 2

N 2

Go to CS 2

CS 2

S S Go to C 2 H 4

C 2 H 4

Go to HC=N

HCN

Go to H 2 C=O

H 2 CO

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