ELECTRICITY ,ACID BASE SALTS AND PERIODIC CLASSIFICATION

Atoms of elements in group 1 have ____________.

• one electron in their outermost energy level

• two electrons in their outermost energy level

• seven electrons in their outermost energy level

• eight electrons in their outermost energy level

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NGSS.HS-PS1-1

What is the heaviest metalloid:

• Boron

• Radon

• Polonium

• Tellurium

Shiny (luster) and good conductors of electricity:

• Nonmetal

• Lightning

• Metal

• Semi-metal

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NGSS.HS-PS1-1

The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

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NGSS.MS-PS1-1

How many valence electrons does an atom of sulfur (S) have?

• 2
• 3
• 6
• 16

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Mendeleev arranged the elements by their ________________

• alphabetical

• density

• melting point

• atomic mass

The horizontal rows on the periodic table are called

• groups

• families

• periods

• atomic numbers

Each vertical column on the periodic table is called a...

• group

• tower

• period

• crew

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NGSS.MS-PS1-1

In the modern periodic table elements are arranged by:

• atomic mass
• atomic number
• valence electrons
• number of isotopes

How many Valance electrons does Iodine Have?

• 6

• 16

• 7

• 17

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NGSS.HS-PS1-1