Atomic Structure and the Periodic Table

How do you find out how many neutrons an element has?

• Subtract the protons from neutrons

• Subtract the number of neutrons from the atomic mass

• Add the protons to the neutrons

• Subtract the number of protons from the atomic mass

The element symbol for Oxygen is:

• Ox

• O

• Oxygen

• O+

The element symbol for Krypton is

• Kr

• K

• Kt

• Kn

Aluminum (Al) has an atomic number of 13, and an atomic mass of 27. How many protons, electrons, and neutrons does it have?

• 13

• electrons

• 14

• protons

• 13

• neutrons

NItrogen ( has an atomic number of 7 and an atomic mass of 14. How many protons, neutrons, and electrons does it have?

• 7

• protons

• 7

• neutrons

• 7

• electrons

Neon (Ne) has an atomic number of 10 and an atomic mass of 20. How many neutrons does it have?

• 11

• 10

• 12

• 9

Which Bohr model accurately illustrates Sulfur (S)?

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Which Bohr model accurately illustrates Magnesium (Mg)?

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How many valence electrons does Phosphorus (P) have?

• 4

• 7

• 5

• 1

How many valence electrons does Barium (Ba) have?

• 1

• 2

• 6

• 8