Periodic Table and Chemical Formulas

Based on the data, which number shows the correct location of the element with 2 valence electrons and 3 energy levels.

• 1

• 2

• 3

• 4

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112.20.b.5.C

Based on the data, which number shows the correct location of the element with 2 valence electrons and 1 energy levels.

• 1

• 2

• 3

• 4

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112.20.b.5.C

Which statement best describes the position of the two elements in the periodic table.

• The two elements are in the same period, with Mg the first element in the period table and Ca the last element

• The two elements are in the same group, with Mg just above Ca

• The two elements are side by side in the same period, with Ca to the left of Mg

• The two elements are in the same group, with Ca just below Mg

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112.20.b.5.C

Which of these elements is in this group?

• Lithium

• Silicon

• Aluminum

• Strontium

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112.20.b.5.C

Which two elements on the periodic table are in the same group?

• Na and He

• O and C

• Li and Ne

• He and Ar

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112.20.b.5.C

How many valence electrons are in an element in group 15 in the periodic table?

• 5

• 15

• 7

• 8

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112.20.b.5.C

Which two atoms are elements that belong in period two in the periodic table?

• Atom 3 and Atom 4

• Atom 1 and Atom 4

• Atom 3 and Atom 2

• Atom 1 and Atom 2

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112.20.b.5.C

Based on the data, which number shows the correct location of the element that is malleable and a good conductor.

• 1

• 2

• 3

• 4

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112.20.b.5.C

Students collected data on five elements. Their data are shown in the table. Lithium and ​ (a)   have the same number of energy levels because they are in the same ​​​ (b)   .

• Beryllium
• period
• Sodium
• Magnesium
• Potassium
• family

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112.20.b.5.C

Which element has chemical properties that are MOST similar to the chemical properties of Sulfur?

• Silicon

• Chlorine

• Selenium

• Phosphorus

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112.20.b.5.C