Thomson<span> is the scientist who designed an experiment that enabled the first successful detection of an individual subatomic particle. </span>J.J. Thomson<span> (Sir </span>Joseph John Thomson<span>, 1856-1940), who demonstrated in 1897 that "cathode rays" consisted of negatively-charged particles, later named electrons.</span>
Yes because Na is a metal and Cl is a nonmental, so they criss cross charges, as Na is 2+ and Cl is 2-, 2+ indicates that Na gives AWAY electrons to Cl and the 2- on Cl indicates it receiving electrons. NaCl is table salt and forms a crystal lattice structure, which is why salt is solid at room temperature.
Answer:
Gas is a state of indefinite expansion, where the molecules are far apart
This is a trick question really, or at least the wording is poor chemistry. Molecules are the smallest unit of a simple covalent compound that retain the chemical properties of that compound. Covalent means there are bonds between atoms due to sharing a pair of electrons, and an example of such a compound is water, H2O. There are discrete H2O molecules moving past each other, with only weak intermolecular forces in between them.
Yet MgCl2 is not a covalent compound. In fact the bonding is ionic, meaning that electrons are transferred between the atoms to form positive and negative ions, which then electrostatically attract. Ionic compounds form a giant ionic lattice, a continuous structure of millions of these ions. An ionic molecule does not really exist.
What I assume is meant is the formula unit, a term very similar in meaning to a molecule. The difference is well shown by comparing empirical formula and molecular formula. A molecular formula shows how many of each atom are in a molecule, yet the empirical formula just shows the simplest whole-number ratio between the number of these atoms. Take ethane: the molecular formula is C2H6 and the empirical formula is CH3.
The ionic formula unit is like this empirical formula. By this standard the likely answer is A (1), because the formula shows that for every magnesium atom, there are two chlorine atoms.
I hope this helps :)
