Question 7
arsenic is a metalloid. which statement best describes arsenic?
a
arsenic is similar to a nonmetal because it is a gas at room temperature and similar to a metal because it is not malleable.
b
arsenic is similar to a nonmetal because it is brittle and similar to a metal because it conducts heat and electricity well.
c
arsenic is only similar to a metal because it is not ductile and is a gas at room temperature.
d
arsenic is only similar to a nonmetal because it is a good conductor and is reflective.

B.

Explanation:

It is brittle like a nonmetal but conducts electricity and heat  like a metal.

The correct answer is Option B.

Explanation:

Metalloids are defined as the elements which show properties of both metals and non-metals. There are 7 metalloids in the periodic table. They are Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium and Polonium

Properties shown by metalloids:

Arsenic is a metalloid which belongs to Group 15 and Period 4 of the periodic table.

This element is brittle in nature and thus is similar to non-metals. Also, it conducts electricity and heat and thus is similar to metals.

Hence, the correct answer is Option B.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.