Reactivity of metals and Non-metals

A chemist is looking for an element that reacts similarly to the element

lithium (Li). Which would be the best choice?

• gold (Au)

• neon (Ne)

• fluorine (F)

• sodium (Na)

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NGSS.HS-PS1-1

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Which best describes the purpose for the bold staircase line on the right

side of the periodic table?

• to separate gases from liquids

• to separate metals from nonmetals

• to separate transition metals from alkaline earth metals

Which element has similar characteristics to lithium (Li) and potassium

(K)?

• helium (He)

• sodium (Na)

• beryllium (Be)

• magnesium (Mg)

Which element is a member of the halogen family?

• helium (He)

• oxygen (O)

• sodium (Na)

• chlorine (Cl)

Which is a property of metalloids?

• the ability to conduct electricity under certain conditions

• the ability to be a liquid at room temperature

• the ability to be hammered into sheets

Which best describes a row of elements in the periodic table?

• column

• family

• group

• period

Which best describes elements found in a column of the periodic table?

• The elements have the same-size atoms.

• The elements have the same atomic number.

• The elements have similar chemical properties.

• The elements are all found naturally in the same physical state.

Which best describes how the current periodic table is arranged?

• by atomic mass

• by atomic number

• in alphabetical order by element symbol

• in numerical order by number of neutrons in the nucleus

Which of these elements is most reactive?

• neon (Ne)

• carbon (C)

• sodium (Na)

• magnesium (Mg)

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NGSS.HS-PS1-1

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How are elements ordered in the modern periodic table?

• by date of discovery

• by decreasing atomic mass

• by increasing atomic number

• by alphabetical order of element symbols