Chemistry: Oxygen and Base Line
Write your name here
Surname
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Centre Number
Candidate Number
Edexcel IGCSE
Chemistry
Unit: 4CH0
Science (Double Award) 4SC0
Paper: 1C
Wednesday 25 May 2011 – Morning
Time: 2 hours
Paper Reference
4CH0/1C
4SC0/1C
You must have:
Ruler
Candidates may use a calculator.
Total Marks
Instructions
black ink or
• Usein the boxesball-point pen. page with your name,
Fill
at the top of this
• centre number and candidate number. all
• Answer thequestions. in the spaces provided questions • Answermay be more space than you need. – there
• Show all the steps in any calculations and state the units.
Information
for
• The total markeachthis paper is 120. in brackets
The marks for question are shown
• – use this as a guide as to how much time to spend on each question.
Advice
Read carefully • Keep each questiontime. before you start to answer it.
• Write an eye on the neatly and in good English.
• Try toyour answers question.
• Checkanswer every if you have time at the end.
• your answers
P38731A
©2011 Edexcel Limited.
1/1/1/1/
*P38731A0132*
Turn over
2
*P38731A0232*
Answer ALL questions.
1 Atoms contain three different types of particle.
These are electrons, neutrons and protons.
(a) Which one of the three particles has a negative charge?
(1)
............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(b) Which one of the three particles has the smallest mass?
(1)
............................................ . . . . . . . . . . . . . . . . . . . .
Surname
Other names
Centre Number
Candidate Number
Edexcel IGCSE
Chemistry
Unit: 4CH0
Science (Double Award) 4SC0
Paper: 1C
Wednesday 25 May 2011 – Morning
Time: 2 hours
Paper Reference
4CH0/1C
4SC0/1C
You must have:
Ruler
Candidates may use a calculator.
Total Marks
Instructions
black ink or
• Usein the boxesball-point pen. page with your name,
Fill
at the top of this
• centre number and candidate number. all
• Answer thequestions. in the spaces provided questions • Answermay be more space than you need. – there
• Show all the steps in any calculations and state the units.
Information
for
• The total markeachthis paper is 120. in brackets
The marks for question are shown
• – use this as a guide as to how much time to spend on each question.
Advice
Read carefully • Keep each questiontime. before you start to answer it.
• Write an eye on the neatly and in good English.
• Try toyour answers question.
• Checkanswer every if you have time at the end.
• your answers
P38731A
©2011 Edexcel Limited.
1/1/1/1/
*P38731A0132*
Turn over
2
*P38731A0232*
Answer ALL questions.
1 Atoms contain three different types of particle.
These are electrons, neutrons and protons.
(a) Which one of the three particles has a negative charge?
(1)
............................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(b) Which one of the three particles has the smallest mass?
(1)
............................................ . . . . . . . . . . . . . . . . . . . .