What statement is true about the eight elements on the periodic table termed metalloids?

a. they are the only man-made elements.

b. they have properties of both metals and nonmetals.

c. they are the only naturally occurring elements.

d. they all have the same number of protons and neutrons.

See Explanation

Explanation:

The answer would be B), because we know the other answers are just plain incorrect.

Option (B) is the correct answer.

Explanation:

Metalloids are the substances which show properties of both metals and non-metals.

Metalloids are moderately able to conduct heat and electricity. And, generally metalloids are solid at room temperature.

They are also able to react with other molecules like metals.

For example, boron, silicon, germanium etc are metalloids.

All of them contains different number of protons and neutrons.

Metals are good conductors of heat ant electricity and generally they are solid at room temperature. Metals have a shiny surface and they are also malleable and ductile.

On the other hand, non-metals are bad conductors of heat and electricity. They are brittle and non-shiny in nature.

Thus, we can conclude that the statement they have properties of both metals and nonmetals.

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

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