Unit 5: Periodic Table

Elements that are in the same group have the same number of _____________

• protons.

• neutrons.

• valence electrons.

• protons and neutrons.

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NGSS.HS-PS1-2

Which of the following is an alkali metal?

• calcium

• magnesium

• mercury

• sodium

How was Mendeleev's periodic table arranged?

• by increasing atomic mass

• by decreasing atomic mass

• by increasing atomic number

• by decreasing atomic number

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NGSS.HS-PS1-2

Columns on the periodic table are called __________

• an element.

• a group.

• an isotope.

• a period.

The three main groups of elements are metals, nonmetals, and

• inert gases.

• alkali metals.

• radioactive isotopes.

• metalloids.

Most elements are

• metals.

• nonmetals.

• metalloids.

• semiconductors.

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NGSS.HS-PS1-1

Elements in a family have similar _________

• atomic symbols.

• atomic sizes.

• atomic weights.

• chemical properties.

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NGSS.HS-PS1-2

The order of elements in the modern periodic table is based on an element's

• atomic number.

• name.

• chemical symbol.

• atomic mass.

Metals tend to be

• gases.

• dull.

• brittle.

• good conductors.

Tags

NGSS.HS-PS1-1

Which group is very stable due to the fact that they have a full outermost energy level?

• alkali metals

• halogens

• alkaline-earth metals

• noble gases

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NGSS.HS-PS1-1