Bulk & Surface Properties (OCR GCSE Chemistry A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
8 questions from this quiz
ShowHide
Practise the questions
8 questions from this quiz
What is the size range of nanoparticles?
What is the size range of nanoparticles?
1 to 100 nm
What is a nanometre?
What is a nanometre?
A billionth of a metre
How many atoms typically make up a nanoparticle?
How many atoms typically make up a nanoparticle?
A few hundred atoms
What is the size range of fine particles (PM2.5)?
What is the size range of fine particles (PM2.5)?
100 to 2,500 nm
What are coarse particles (2,500-10,000 nm) often referred to as?
What are coarse particles (2,500-10,000 nm) often referred to as?
Dust
What property do nanoparticles have compared to larger particles?
What property do nanoparticles have compared to larger particles?
Very high surface area to volume ratio
Why does the large surface area of nanoparticles make them useful?
Why does the large surface area of nanoparticles make them useful?
More reactive & effective as catalysts
If a cube shrinks by 10 times, how does its surface area to volume ratio change?
If a cube shrinks by 10 times, how does its surface area to volume ratio change?
Increases by 10 times