For the lithium atom, $Z=3$; there are 3 positive, nuclear charges. There are 3 extra-nuclear electronic charges, i.e. borne by the 3 electrons, in the neutral atom. Lithium generally loses one electron to form the $Li^+$ cation.
The element is characterized by its $"atomic number, Z"$, where $Z$ is the number of nuclear protons, which are massive, positively charged particles. Now we were given the number of...
And announce that I have discovered $"antimatter"$. The proposition you are making is hard to rationalize. What's an atom? As far as anyone knows, it's a collection of fundamental particles,...
carbon-12 and carbon-14 are of the same element, carbon. this means that they have the same number of protons and the same number of electrons - just different numbers of...
And $Z$ defines the identity of the element: $Z=1,H;Z=2,He;..........Z=6,C;........Z=37, Ru...........$ You don't have to remember these numbers, because a Periodic Table will be supplied to you in every test of...
You might have to rethink this question. All states of matter, $"solids, liquids, and gases,"$ are composed of atoms, which in turn are composed of positively and neutrally charged, massive...
is to a very good first approx. NUCLEAR mass, i.e. the number of massive nuclear particles. The helium nucleus has 2 protons, 2 positively charged, massive particles, $Z=2$, and...
Electrons themselves have a negative charge. When you add an electron to an atom that is neutral, the atom becomes negatively charged. Take Sodium (Na) for example. It has 11...
Protons, massive, positively charged nuclear particles, have an opposite electronic charge to electrons, extra-nuclear particles of negligible mass. The positive/negative charge convention is entirely arbitrary. The point is that...
In fact, Thomson's first "guess" was that the bulk of the atom was a positively-charged ball of fluid-like matter, with just enough positive charge to cancel the negative charge on...
Since the given information is in moles, we need only look at the ratio between the chemicals: Six moles of Li will produce 2 moles of lithium nitride. So, the...
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