Question 4.6: Atomic Number, Protons, and Electrons Using the periodic tab...

Chemistry an Introduction to General, Organic, and Biological Chemistry

Atomic Number, Protons, and Electrons

Using the periodic table, state the atomic number, number of protons, and number of electrons for an atom of each of the following elements:

a. nitrogen b. magnesium c. bromine

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	Atomic Number	Number of Protons	Number of Electrons
ANALYZE THE PROBLEM	shown above the element symbol on the periodic table	equal to the atomic number	equal to the number of protons

a. On the periodic table, the atomic number for nitrogen (N) is 7. Thus, nitrogen atoms contain 7 protons and 7 electrons.

b. On the periodic table, the atomic number for magnesium (Mg) is 12. Thus, magnesium atoms contain 12 protons and 12 electrons.

c. On the periodic table, the atomic number for bromine (Br) is 35. Thus, bromine atoms contain 35 protons and 35 electrons.

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