For example, lithium atoms contain 3 protons. The atomic number 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 display this information around an atom using its symbol and also atomic number:lithium(The symbol because that lithium is Li - keep in mind it starts v a capital letter back its name, lithium, starts with a small letter.)The atom number is created to the left of 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 external the nucleus.Neutral atomsA neutral lithium atom will likewise have 3 electrons. The negative electrons balance the fee of the positive protons in the nucleus. Although it is the variety of protons that determines the element, the number of electrons will always be the exact same as the atomic number in a neutral atom.

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

Question 6Look in ~ the icons below. In each case, decision on the missing information and type it right into the space.a) nitrogeni. Variety of protonsii. Atom numberb)heliumnumber of electrons(in neutral atom)c)XThe symbol for the elementrepresented by Xd)oxygenThe amount of positive charge in the nucleusplease choose02468navigation bar