For example, lithium atoms contain 3 protons. The atomic variety of lithium is 3. Any kind of atom that has 3 protons need to be a lithium atom.

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Putting the in symbolsWe can show this information about an atom making use of its symbol and atomic number:lithium(The symbol because that lithium is Li - keep in mind it starts v a capital letter back its name, lithium, starts v a tiny letter.)The atomic number is written to the left the the symbol.

lithiumn nucleus interactive graphicPicture 2.2 Lithium has actually 3 positve proton in that is nucleus. However, a lithium atom is neutral since there room 3 an unfavorable electrons outside the nucleus.Neutral atomsA neutral lithium atom will additionally have 3 electrons. The negative electrons balance the charge of the positive protons in the nucleus. Although the is the variety of protons the determines the element, the number of electrons will always be the very same as the atom number in a neutral atom.

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Neutrons and isotopesThe cell nucleus of every lithium atom has 3 ptotons. However, the number of neutrons have the right to vary. This gives rise to different isotopes (see pages 8 and also 9).

Question 6Look at the signs below. In every case, decide on the lacking information and type it right into the space.a) nitrogeni. Number of protonsii. Atom numberb)heliumnumber that electrons(in neutral atom)c)XThe symbol for the elementrepresented through Xd)oxygenThe quantity of positive charge in the nucleusplease choose02468navigation bar