How can we find the number of protons and electrons present in a neutral atom?
Grab a Periodic Table!
The number of protons present inside the nucleus of a given element is given by the atomic number, which is listed in the Periodic Table of Elements.
For example, carbon,
Now, a neutral atom will always have equal numbers of protons inside the nucleus and of electrons outside the nucleus.
#color(red)(ul(color(black)("no. of protons = no. of electrons "))) implies color(darkgreen)(ul(color(black)(" neutral atom")))#
This implies that for neutral atoms, the atomic number, which gives you the number of protons located inside the nucleus, will also give you the number of electrons that surround the nucleus.
In carbon's case, a neutral carbon atom has
So, to figure out the number of protons and electrons present in a neutral atom, find the element in the Periodic Table and look for its atomic number.
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An atom's atomic number, which is represented on the periodic table, is equal to the number of protons in the atom; similarly, the atomic number of a neutral atom is equal to the number of electrons in the atom.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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- The net charge on a sulfide ion, #"S"^(2-)#, is #2-#. How does this ion obtain its charge?
- Is HCN a molecular or ionic compound?

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