Match the element with its description.

match
term
definition

potassium
a) malleable and highly reactive

barium
b) great conductor of heat and electricity

boron
c) has properties of both metals and nonmetals

neon
d) nonreactive gas

Explanation:

Potassium

Malleable and highly reactive.

It is present in group one.

It has one valance electron.

It lose one electron and readily react with other metals.

Barium

Great conductor of heat and electricity.

Barium is present in group two.

It has two valance electrons.

It is alkaline earth metal.

Boron

C) Has properties of both metals and nonmetals.

Boron in present in group 13.

It is metalloid because it is present in crystalline form like metals and very low conductivity like non metals.

Neon

It is non reactive gas.

It is present in group 18.

Its octet is complete and non reactive noble gas.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.