Chemistry-Periodic Table

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True or False: More than three-fourths of the elements in the periodic table are nonmetals.

False- most are metals

True or False: Group 1A elements (except for hydrogen) are known as the alkali metals.

True

True or False: Group 3A elements are the alkaline earth metals

False- group 2A elements are the alkaline earth metals

True or False: Group 7A elements are highly reactive nonmetals known as halogens.

True

True or False: Group 8A elements are very unreactive elements known as transition metals

False- group 8A elements are the noble gases

True or False: Metalloids have properties of both metals and inner transition metals.

False- have properties of metals and non-metals

The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to

Mendeleev

Mendeleev left spaces in his periodic table and predicted several elements and their

...

Mendeleev attempted to organize the chemical elements based on their

...

Mendeleev noticed that properties of elements usually repeated at regular intervals when the elements were arranged in order of increasing

...

Mendeleev is credited with developing the first successful

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Mendeleev did not always list elements in his periodic table in order of increasing atomic mass because he grouped together elements with similar

...

In developing his periodic table, Mendeleev listed on cards each element's name, atomic mass, and

...

Mendeleev predicted that the spaces in his periodic table represented

...

Mendeleev's table was called periodic because the properties of the elements

...

The person whose work led to a periodic table based on increasing atomic number was

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Moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing

...

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