Atom and Periodic Table Review

The picture shows the information for the element Americium from the periodic table. According to this information, how many neutrons will be found in one atom of Americium?

• 95

• 243

• 148

• 338

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An element is located on the periodic table according to

• when it was discovered

• its chemical name

• its chemical symbol

• its physical and chemical properties

A nucleus composed of 15 protons and 18 neutrons would have a mass of about

• 23

• 18

• 15

• 33

An atom of an element in Group 16 has how many valence electrons?

• 6

• 16

• 8

• 26

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An atom that has 12 protons, 14 neutrons, and 12 electrons has an atomic number of

• 12

• 26

• 14

• 38

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How many electrons does an atom with an atomic number of 20 and a mass number of 42 have?

• 20

• 42

• 22

• 62

What subatomic particles compose the nucleus?

• Electrons and neutrons

• Protons and neutrons

• Protons and electrons

• Protons ions

Which of these categories would you find elements that have the ability to conduct heat and electricity?

• metals

• metalloid

• nonmetals

• noble gases

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The rows that are found in the PTE are called

• valance electrons

• periods

• groups or families

• columns

The columns that are found in the PTE are called

• valance electrons

• periods

• groups or families

• metalloids