Periodic law

The periodic law states that there is periodic repetition of the physical and chemical properties of elements -

• when they are arranged in order of increasing atomic mass.
• if only metals are considered.
• when they are arranged in order of increasing atomic radii.
• when they are arranged in order of increasing atomic number.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

The vertical columns of the periodic table are called -

• groups.
• rows.
• periods.
• transition.

The representative elements are usually called -

• noble gases.
• Group A elements.
• Group B elements.
• halogens.

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NGSS.HS-PS1-1

Which orbital block corresponds to transition metals in the periodic table?

• s
• p
• d
• f

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NGSS.HS-PS1-1

The element bromine is a -

• Period 3 alkali metal.
• Period 4 halogen.
• Period 3 noble gas.
• Period 4 transition metal.

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NGSS.HS-PS1-1

The category of elements that is characterized by the filling of f orbitals is the -

• alkali metals.
• transition elements.
• alkaline earth metals.
• inner transition metals.

Which of the following atoms would you expect  to have the largest atomic radius?

• Li
• K
• Ca
• Br

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NGSS.HS-PS1-1

The alkali metals do not include -

• K.
• Ca.
• Na.
• Cs.

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NGSS.HS-PS1-1

Which statement best explains how periods on the periodic table are organized? 

• increasing atomic number from left to right
• increasing number of neutrons from left to right
• decreasing number of electrons from left to right
• decreasing atomic mass number from left to right

Tags

NGSS.HS-PS1-2

Which pair of elements has the most similar properties?

• Li and B
• I and Ca
• K and He
• N and P 

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NGSS.HS-PS1-1