Chemistry Practice Test – Particulate Nature of Matter


Hello and Welcome to Chemistry Practice Tests - Particulate Nature of Matter

  1. You are to attempt 5 random objectives questions ONLY.
  2. Supply Your Full Name and Location in the text box below and begin immediately.
  3. You can attempt as many times as possible


Given that 32.0 g of sulphur contains 6.02 x 1023 atoms, how many atoms are there in 2.7 g of aluminium? [Al = 27, S = 32] (NECO 2021)

A. 5.08 x 1022       B. 6.02 x 1022       C. 3.01 x 1023      D. 6.02 x 1023


The atomic number of an element is 17. It has different atoms containing 18 neutrons and 20 neutrons, with a relative abundance of 75% and 25% respectively. Calculate the relative atomic mass of the element. 

A. 35     B. 30    C. 35.5     D. 30.5


The nucleus of an atom contains ______

A. neutrons and electrons only.
B. proton and neutron only.
C. neutron, electron and proton.
D. proton and electron only.


X is an element which exists as an isotopic mixture containing 90% of  and 10% of . Calculate the mean relative atomic mass of X. 

A. 38      B. 39      C. 40      D. 39.2


If 1 mole of sodium contains 6 x 1023 atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23] (WASSCE 2006)

A. 1.57 x 1023        B. 1.57 x 1022        C. 3.6 x 1023        D. 3.6 x 1022


 



error: Content is protected !!