3 (a) (i) Use words from the box to complete the sentences below about ions - Edexcel - GCSE Physics Combined Science - Question 3 - 2019 - Paper 1
Question 3
3 (a) (i) Use words from the box to complete the sentences below about ions.
Atoms may form positive ions by ________________________ electrons.
The electrons invol... show full transcript
Worked Solution & Example Answer:3 (a) (i) Use words from the box to complete the sentences below about ions - Edexcel - GCSE Physics Combined Science - Question 3 - 2019 - Paper 1
Step 1
Use words from the box to complete the sentences below about ions.
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Answer
Atoms may form positive ions by losing electrons.
The electrons involved in forming positive ions are the outer electrons.
Step 2
Which of these radiations is both electromagnetic and ionising?
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Answer
The answer is C gamma.
Step 3
Which type of radiation will travel the shortest distance in air?
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Answer
The answer is A alpha.
Step 4
State one way in which radioactive isotopes can be harmful to people.
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Answer
Radioactive isotopes can cause radiation sickness when people are exposed to high levels.
Step 5
Describe what happens to the nucleus of a lead-214 atom when it emits a $eta^-$ particle.
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Answer
When a lead-214 atom emits a eta^- particle, a neutron in the nucleus is transformed into a proton, resulting in an increase in the atomic number by one and transforming it into a different element.
Step 6
The typical size of an atom is
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Answer
The answer is B 10−10 m.
Step 7
Calculate how many times the mass of a proton is greater than the mass of an electron.
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Answer
The mass of a proton is approximately 1.6726imes10−27 kg and the mass of an electron is approximately 9.1094imes10−31 kg.
To find how many times the mass of a proton is greater than the mass of an electron:
