HPS Periodic

Which statement about all the noble gases is correct? J2005, Q5

• The number of protons in the atoms equals the number of neutrons.

• Their atoms each have a stable arrangement of electrons.

• Their atoms each have eight electrons in their outer shell.

• They exist as molecules containing two atoms

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NGSS.HS-PS1-1

Many properties of an element and its compounds can be predicted from the position of element in the Periodic Table. What property could not be predicted in this way? N2005, Q23

• The acidic or basic (alkalinity) nature of its oxide

• The formula of its oxide

• The number of isotopes it has

• Its metallic or non-metallic properties

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NGSS.HS-PS1-1

Which graph shows the number of electrons in the outer shell of an atom, plotted against the proton (atomic) number for the first ten elements in the Periodic Table? J2006, Q6

• 
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NGSS.HS-PS1-1

A lump of element X can be cut by a knife.

During its reaction with water X floats and melts.

What is X? J2006, Q23

• Calcium

• Copper

• Magnesium

• Potassium

Which deduction about the element astatine, At, can be made from its position in Group VII? J2006, Q24

• It forms covalent compounds with sodium.

• It is displaced from aqueous potassium astatide, KAt, by chlorine.

• It is a gas.

• It is more reactive than iodine.

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Rubidium is in Group I of the Periodic Table.

What are properties of rubidium chloride? J2006, Q26

• A

• B

• C

• D

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NGSS.HS-PS1-2

The positions of four elements are shown on the outline of part of the Periodic Table. Element X has a high melting point and is a good conductor of electricity. It forms chlorides XCl₂ and XCl₃.

Which element is X? N2006, Q21

• A

• B

• C

• D

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Rubidium, Rb, is an element in Group I of the Periodic Table. Which statement about rubidium is correct? J2007, Q24

• It reacts slowly with water.

• It forms an insoluble hydroxide.

• It forms as ion, Rb²⁺

• It forms a sulfate, Rb₂SO_4.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The element sulfur, S, is in Group VI of the Periodic Table. Which formula is incorrect? J2007, Q25

• S^2–

• S₂O₃

• SO₄^2-

• SO₃

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NGSS.HS-PS1-2

The table shows some of the properties of four elements.

Which element is most likely to be a transition metal? J2007, Q26

• A

• B

• C

• D

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