In Figure 1, the letters A, E, 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 elements. (a) Using the letters A, E, J, X and Z (i) give the letters of the two elements that are non-metals (ii) give the letters of two elements in period 2 (iii) give the letter of an element that normally forms an ion with a charge of +1. (b) Element E has an atomic number of 5. In a sample of E there are two isotopes. One isotope has a mass number of 10 and the other isotope has a mass number of 11. (i) Explain, in terms of subatomic particles, what is meant by the term isotopes.

GCSE Edexcel Chemistry Combined Science Group 7 – Halogens: In Figure 1, the letters A, E, J

In Figure 1, the letters A, E, 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

In Figure 1, the letters A, E, 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 elements.... show full transcript

Worked Solution & Example Answer:In Figure 1, the letters A, E, 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 elements that are non-metals 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 letters of 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 letter of an element that normally forms an ion with a charge of +1 is J.

Step 4

(b) Element E has an atomic number of 5. In a sample of E there are two isotopes. One isotope has a mass number of 10 and the other isotope has a mass number of 11. (i) Explain, in terms of subatomic particles, what is meant by the term isotopes.

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Answer

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons. For element E with an atomic number of 5, it has 5 protons and can have isotopes with the following configurations:

One isotope may have 5 neutrons (mass number 10, since 5 protons + 5 neutrons = 10).
The other isotope may have 6 neutrons (mass number 11, since 5 protons + 6 neutrons = 11).

In Figure 1, the letters A, E, J, X and Z show the positions of six elements in the periodic table - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1

Worked Solution & Example Answer:In Figure 1, the letters A, E, J, X and Z show the positions of six elements in the periodic table - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2019 - Paper 1

Using the letters A, E, J, X and Z, (i) give the letters of the two elements that are non-metals

Using the letters A, E, J, X and Z, (ii) give the letters of two elements in period 2

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

(b) Element E has an atomic number of 5. In a sample of E there are two isotopes. One isotope has a mass number of 10 and the other isotope has a mass number of 11. (i) Explain, in terms of subatomic particles, what is meant by the term isotopes.

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