Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
331–340 of 991
Question 331
1 mark · Normal
Answer and check →Which of the following elements is in period 2 and group 7 of the Periodic Table?
- A.Fluorine (2,7)
- B.Chlorine (2,8,7)
- C.Nitrogen (2,5)
- D.Neon (2,8)
Question 332
2 marks · Normal
Answer and see the solution →State the group and period of silicon (atomic number 14) and explain your reasoning.
Question 333
4 marks · Normal
Answer and see the solution →(a)[1 mark]Draw or describe the electronic configuration for sodium (Na, atomic number 11).
(b)[1 mark]Identify its group and period in the Periodic Table.
(c)[2 marks]Explain how sodium’s position in the Periodic Table is related to its electronic configuration.
Question 334
2 marks · Hard
Answer and see the solution →An unknown element X has the electronic configuration 2, 8, 3. State the group and period of element X in the Periodic Table.
Question 335
5 marks · Hard
Answer and see the solution →An element Y has the atomic number 15.
(a)[1 mark]Write the electronic configuration for element Y.
(b)[1 mark]State the number of electrons in the outer shell of element Y.
(c)[2 marks]Identify the group number and the period number for element Y.
(d)[1 mark]Explain how the electronic configuration relates to the group and period for element Y.
Question 336
2 marks · Hard
Answer and see the solution →Explain why an atom with the electronic configuration 2, 7 is placed in both Group 7 and Period 2 of the Periodic Table.
Question 337
1 mark · Easy
Answer and see the solution →State whether the element magnesium (Mg) is a metal or a non-metal.
Question 338
3 marks · Easy
Answer and see the solution →This question is about similarities in chemical properties in groups and the inertness of Group 0 elements.
(a)[1 mark]State the number of electrons in the outer shell of a fluorine atom.
(b)[1 mark]Explain why the elements in Group 7 have similar chemical properties.
(c)[1 mark]Explain why helium is unreactive.
Question 339
2 marks · Easy
Answer and see the solution →Calcium (Ca) forms an oxide when it reacts with oxygen. The formula of the oxide is either CaO or CaO2. Using your knowledge of the periodic table, determine which formula is correct for the oxide of calcium and state how many oxygen atoms are present in the formula.
Question 340
2 marks · Easy
Answer and see the solution →Explain, using your knowledge of the periodic table, why elements in Group 2 have similar chemical properties.