Unit 2 Review

What does the number 18.998 represent?

• The atomic number of fluorine

• The number of electrons in fluorine

• The number of protons in fluorine

• The average atomic mass of fluorine

The atomic number of magnesium is 12. This means that its nucleus must contain

• 6 protons and 6 neutrons.

• 12 neutrons and no protons.

• 12 protons and no electrons.

• 6 neutrons and 6 electrons.

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Which type of element typically loses an electron to become an ion?

• Gas

• Metal

• Non-metal

• Metalloid

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Which sub-atomic particle is positively charged and found in the nucleus?

• Proton

• Neutron

• Electron

• Ionic charge

Which of these statements is correct about nitrogen?

• All Nitrogen atoms have 14 protons.

• Nitrogen atom has more protons than a Fluorine anion.

• All Nitrogen atoms have 7 protons.

• The mass number of Nitrogen is 21.

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Elements in the same group/family of the periodic table are similar in what way?

• They are all metals

• They have a full outer shell of electrons.

• They are all nonmetals

• They have the same number of valence electrons.

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Which word(s) is/are represented by the word "period" in the term Periodic Table?

• Group

• Family

• Energy Level

• Valence Electrons

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The atomic mass of an element is the sum of neutrons and

• Atoms

• Protons

• Electrons

• Isotopes

A researcher is trying to create a new super conductive wire. Which category on the periodic table should he or she look in first?

• Metals

• Metalloids

• Non-metals

• Noble gases

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How many protons, neutrons, and electrons are in a neutral atom with the symbol ⁴¹Ca

• 20 protons, 21 neutrons, 21 electrons

• 20 protons, 21 neutrons, 20 electrons

• 21 protons, 21 neutrons, 20 electrons

• 41 protons, 0 neutrons, 41 electrons

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