CIE iGCSE Co-Ordinated Science C2.2 Atomic structure and the Periodic Table Exam Style Questions Paper 2
Question
W, X, Y and Z are diagrams representing atoms and molecules.
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.
▶️Answer/Explanation
Ans: C
Question
What do the chemical symbols N2 and Ni represent?
▶️Answer/Explanation
Ans: D
Question
The nucleon number of a hydrogen atom is 1.
What is present inside the nucleus of this atom?
(A) one proton and one electron
(B) one proton and one neutron
(C) one proton only
(D) one neutron only
▶️Answer/Explanation
Ans: C
Question
The element phosphorus burns in air, as shown.
4P + 5O2 → P4O10
What does the formula P4O10 show?
A a mixture of atoms of two elements
B a mixture of molecules of two elements
C a molecule of a compound
D an atom of a compound
▶️Answer/Explanation
Ans : C