3.3 Molecular substances

Molecular substances
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Slide 1: Slide
ScheikundeMiddelbare schoolhavoLeerjaar 3

This lesson contains 12 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 30 min

Items in this lesson

Molecular substances
Paragraph 3.3

Slide 1 - Slide

Learning goals
At the end of the lesson you can:
  • State the properties of molecular substances
  • Derive the systemic name from the molecular formula and backwards.

Slide 2 - Slide

Properties molecular substances

Consists of molecules made of non-metal atoms
Have relatively low melting points
Usually don't conduct electricity
Form the largest group of the three types of substances

Slide 3 - Slide

From molecular formula to name (1)
1. Write down the names of the symbols
2. Write down the Greek numeral for the index of each kind of atom. (mono only with the second atom)
3. Write down the suffix after the last kind of atom

Slide 4 - Slide

Greek numerals

Slide 5 - Slide

From molecular formula to name (2)
The name of the last atom changes a bit (-ide):
- chlorine => chloride
- sulphur => sulfide
- oxygen => oxide 

Slide 6 - Slide

Systematic name

Slide 7 - Slide

What shows a total number of 6 atoms in a molecule?
A
hexa
B
tri
C
di
D
penta

Slide 8 - Quiz

What is the name of:
A
phosphoruschloride
B
phosphoruspentachloor
C
phosphoruspentachloride
D
pentachloorphosphoride

Slide 9 - Quiz

What is the name of


SiBr4(s)
A
siliciumbromide
B
siliciumtribromide
C
siliciumtetrabromide
D
siliciumpentabromide

Slide 10 - Quiz

Do exercises
Make 34+35+38 (15 min in silence)
Finished? Make 28b,c, 29a,b, 32a,b

Slide 11 - Slide

Reflection
At the end of the lesson you can:
  • State the properties of molecular substances
  • Derive the systemic name from the molecular formula and backwards.

Slide 12 - Slide