Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Atomic number and mass number
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State the position of protons in an atom.
Question 2
3 marks · Easy
Answer and see the solution →(a)[1 mark]Define the term 'isotope'.
(b)[1 mark]Give the meaning of 'mass number'.
(c)[1 mark]Define 'atomic number'.
Question 3
2 marks · Easy
Answer and see the solution →An atom has an atomic number of 9 and a mass number of 19. Calculate the number of neutrons in this atom. Show your working.
Question 4
2 marks · Easy
Answer and see the solution →Explain why the atomic number is important in identifying an element.
Question 5
3 marks · Easy
Answer and see the solution →Properties of Three Sub-Atomic Particles Particle Relative mass Relative charge A 1 +1 B 1/1836 -1 C 1 0 (a)[1 mark]Name particle A.
(b)[1 mark]Name particle B.
(c)[1 mark]State the position in the atom of particle C.
Question 6
1 mark · Easy
Answer and see the solution →State what information the mass number of an atom gives you.
Question 7
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the sub-atomic particle with a negative charge.
(b)[1 mark]State the relative mass of a proton.
(c)[1 mark]Where is the neutron found in the atom?
Question 8
2 marks · Easy
Answer and see the solution →An atom has 13 protons and 14 neutrons. Calculate the mass number of this atom.
Question 9
2 marks · Normal
Answer and see the solution →State the relative charge and relative mass of a neutron.
Question 10
4 marks · Normal
Answer and see the solution →Use the periodic table and your knowledge to answer the following questions about atomic numbers and mass numbers.
(a)[1 mark]Define mass number.
(b)[3 marks]An atom of element X has atomic number 9 and mass number 19.
State how many protons, neutrons and electrons are present in a neutral atom of X.