Q1. The hydrogen halides (hydrogen fluoride, hydrogen chloride, hydrogen brom
hydrogen iodide) are important chemicals.
The diagram below represents a molecule of hydrogen chloride.
н.
(i)
What type of particles are represented by the crosses (X)(X)?

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom. 

The closer the atoms are to becoming ionic the more highly dense the negatively charged side gets.

Hi + naoh -> h2o + nal