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In Figure 1, the letters A, E, G, J, X and Z show the positions of six elements in the periodic table - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
Question 1
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In Figure 1, the letters A, E, G, J, X and Z show the positions of six elements in the periodic table.
These letters are not the symbols of the atoms of these ... show full transcript
Worked Solution & Example Answer:1
In Figure 1, the letters A, E, G, J, X and Z show the positions of six elements in the periodic table - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1
Step 1
Using the letters A, E, J, X and Z (i) give the letters of the two elements that are non-metals
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Answer
The two non-metal elements from the letters provided are E and X.
Step 2
Using the letters A, E, J, X and Z (ii) give the letters of two elements in period 2
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Answer
The two elements in period 2 are A and E.
Step 3
Using the letters A, E, J, X and Z (iii) give the letter of an element that normally forms an ion with a charge of +1
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Answer
The element that normally forms an ion with a charge of +1 is J.
Step 4
Explain, in terms of subatomic particles, what is meant by the term isotopes.
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Answer
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
For example, element E, with atomic number 5, has isotopes with mass numbers 10 and 11.
This means one isotope has 5 protons and 5 neutrons (mass number 10), while the other has 5 protons and 6 neutrons (mass number 11).
