11 the structure of the atom.

Periodic table of elements with names and symbols and atomic mass and atomic number and valency.
When colourless nh 3 and hcl fumes meet dense white smoke fumes of ammonium chloride are observed.
Learners enrolled in this course are required to work responsibly and safely in practical situations in a laboratory using potentially dangerous materials and equipment.
When scientists started exploring matter they realised that matter can be divided into smaller and still smaller particles.
Nh 3 ag hcl ag nh 4 cls.
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