Elements, compounds and mixtures — Paper 2 · IGCSE Sciences - Co-ordinated (Double) 0654

14 W, X, Y and Z are diagrams representing atoms and molecules. W X Y Z Which statement is correct? A W and Z are molecules and X and Y are atoms. B W, X and Z are molecules and Y is an atom. C W, Y and Z are molecules and X is an atom. D X, Y and Z are molecules and W is an atom.

1 marks

Answer: B

This question in 0654/21 Oct/Nov 2018

14 W, X, Y and Z are diagrams representing atoms and molecules. W X Y Z Which statement is correct? A W and Z are molecules and X and Y are atoms. B W, X and Z are molecules and Y is an atom. C W, Y and Z are molecules and X is an atom. D X, Y and Z are molecules and W is an atom.

1 marks

Answer: B

This question in 0654/22 Oct/Nov 2018

16 Compounds are made up from two or more different elements ««1«« bonded together. Compounds cannot be broken down into simpler substances by ««2«« processes. Compounds and their elements have ««3«« properties. Which words complete gaps 1, 2 and 3? 1 2 3 A chemically chemical similar B chemically physical different C physically chemical similar D physically physical different

1 marks

Answer: B

This question in 0654/22 Oct/Nov 2018

14 W, X, Y and Z are diagrams representing atoms and molecules. W X Y Z Which statement is correct? A W and Z are molecules and X and Y are atoms. B W, X and Z are molecules and Y is an atom. C W, Y and Z are molecules and X is an atom. D X, Y and Z are molecules and W is an atom.

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2018

14 Which statement about atoms and molecules is correct? A All molecules are gases at room temperature and pressure. B An atom is the smallest part of an element. C Atoms of the same element all have the same mass. D Molecules always contain atoms of more than one element.

1 marks

Answer: B

This question in 0654/21 May/June 2020

14 Which statement about atoms and molecules is correct? A All molecules are gases at room temperature and pressure. B An atom is the smallest part of an element. C Atoms of the same element all have the same mass. D Molecules always contain atoms of more than one element.

1 marks

Answer: B

This question in 0654/22 May/June 2020

14 Which statement about atoms and molecules is correct? A All molecules are gases at room temperature and pressure. B An atom is the smallest part of an element. C Atoms of the same element all have the same mass. D Molecules always contain atoms of more than one element.

1 marks

Answer: B

This question in 0654/23 May/June 2020

14 The structures of some substances are shown. water ethanol methane Which row shows the total number of different elements and the total number of atoms in the three structures? total total number of number of different atoms elements A 3 9 B 3 17 C 7 9 D 7 17

1 marks

Answer: B

This question in 0654/21 May/June 2021

14 The structures of some substances are shown. water ethanol methane Which row shows the total number of different elements and the total number of atoms in the three structures? total total number of number of different atoms elements A 3 9 B 3 17 C 7 9 D 7 17

1 marks

Answer: B

This question in 0654/22 May/June 2021

14 The structures of some substances are shown. water ethanol methane Which row shows the total number of different elements and the total number of atoms in the three structures? total total number of number of different atoms elements A 3 9 B 3 17 C 7 9 D 7 17

1 marks

Answer: B

This question in 0654/23 May/June 2021

14 Substance P is separated into different parts using simple physical techniques. Substance Q is only separated into simpler parts using chemical processes. Substance R is not separated into simpler parts by either physical or chemical processes. Which type of substance are P, Q and R? P Q R A compound mixture element B element compound mixture C mixture element compound D mixture compound element

1 marks

Answer: D

This question in 0654/22 Feb/March 2022

15 Which diagram represents molecules of a compound? A B C D

1 marks

Answer: B

This question in 0654/22 Feb/March 2023

22 The diagram shows overlapping circles into which different chemical formulae can be placed. is an forms a element basic oxide forms coloured ions Which formula can be placed in the shaded area because it has all three properties? A Br2 B CO C Cu D Na

1 marks

Answer: C

This question in 0654/22 Feb/March 2023

15 What do the chemical symbols N2 and Ni represent? N2 Ni A a compound a compound B a compound an element C an element a compound D an element an element

1 marks

Answer: D

This question in 0654/21 Oct/Nov 2023

15 Which diagram represents a mixture of an element and a compound? A B C D

1 marks

Answer: B

This question in 0654/23 Oct/Nov 2023

14 W, X, Y and Z are diagrams representing atoms and molecules. W X Y Z Which statement is correct? A W and Z are molecules and X and Y are atoms. B W, X and Z are molecules and Y is an atom. C W, Y and Z are molecules and X is an atom. D X, Y and Z are molecules and W is an atom.

1 marks

Answer: C

This question in 0654/22 May/June 2024

23 Compounds are made up from two or more different elements ……1…… bonded together. Compounds cannot be broken down into simpler substances by ……2…… processes. Compounds and their elements have ……3…… properties. Which words complete gaps 1, 2 and 3? 1 2 3 A chemically chemical similar B chemically physical different C physically chemical similar D physically physical different

1 marks

Answer: B

This question in 0654/21 May/June 2025