[DOC] [TLE] Chapter 4 Pretest [PAR] different numbers of neutrons ... elements that are the most reactive is the a. alkali 
... Unlike metals, solid nonmetals are a. good conductors of heat and electric ... 5. 
Unstable atomic nuclei that release fast- moving particles and energy are. [DOC] [TLE] Metals, Metalloids, and Nonmetals [PAR] Information about various chemical compounds and elements. ... 5, Rb, Sr, Y, Zr, 
Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, I, Xe ... Nonmetals are (usually) 
poor conductors of heat and electricity, and are not malleable or ductile; ... In this 
model, each metal atom donates one or more of its valence electrons to make an
... [DOC] [TLE] Period 2 element - Wikipedia [PAR] The period 2 elements are the chemical elements in the second row (or period) of 
the periodic ... The elements in period 2 often have the most extreme properties 
in their .... Boron (B) is the chemical element with atomic number 5, occurring as 
10B and .... Unlike regular diatomic oxygen, ozone is a toxic material generally... [DOC] [TLE] Gallium - Wikipedia [PAR] Gallium is a chemical element with symbol Ga and atomic number 31. It is in 
group 13 of the ... Phosphorus (polyatomic nonmetal) .... 3 History; 4 Occurrence; 
5 Production; 6 Applications ... Unlike mercury, liquid gallium metal wets glass 
and skin, along with most .... :99 They exhibit higher electrical conductivity than 
GaN. [DOC] [TLE] Nonmetal - Wikipedia [PAR] In chemistry, a nonmetal (or non-metal) is a chemical element that mostly lacks 
metallic attributes. Physically, nonmetals tend to be highly volatile (easily 
vaporized), have low elasticity, and are good insulators of heat and electricity; 
chemically ... Seventeen elements are generally classified as nonmetals; most 
are gases... [DOC] [TLE] Boron - Chemical Elements [PAR] Boron, symbol B, hard, brittle semimetallic element with an atomic number of 5. ... 
The atomic weight of boron is 10.81; the element melts at 2075C (3767F), boils 
... a nonmetal, but unlike most nonmetals, pure boron is an electrical conductor,... [DOC] [TLE] Periodic Properties of the Elements - Chemistry LibreTexts [PAR] Jun 22, 2016 ... Additionally, as the atomic number increases, the effective nuclear charge ... 
Therefore, the electrons are held more loosely and the atomic radius is increased
. Cations and Anions.png. Figure 5: Courtesy of Jessica Thornton (UCD) .... heat 
and electricity while Si is only a fair conductor and the nonmetals P,... [DOC] [TLE] nonmetal facts, information, pictures | Encyclopedia.com articles ... [PAR] They are poor conductors of heat and electricity (though carbon, a good electrical 
... Most elements bond according to what is known as the octet rule, forming a 
shell ... level n, they have two valence electrons in the s orbital, and 5 in the p 
orbital. ... The first "orphan" nonmetal, by atomic number, is boron, named after 
the... [DOC] [TLE] Elements and the Periodic Table Multimedia Lesson [PAR] The atomic number represents the most important property of an element. ... They 
are often shiny in appearance and are good conductors of heat and electricity. ... 
Unlike metals, nonmetals have low densities, are brittle, and do not conduct heat 
... 5. The Periodic Table of Elements. 6.1. Arranging the Elements. In 1869 a... [DOC] [TLE] Elements and their uses - Q-files Encyclopedia [PAR] These elements are divided into metals, semi-metals and non-metals. .... Boron (
chemical symbol B; atomic number 5) is a semi-metal, also called a metalloid. .... 
Unlike most elements, carbon occurs as several allotropes (allotropes are 
different ... These metals are usually dense, shiny and make good electrical 
conductors. [DOC] [TLE] Scientific Principles [PAR] Metals (pure elements and alloys) are typically conductors of electricity. ... As 
more and more atoms assemble to form a solid, the number of bonding and ... if 
arsenic is added to

Question: Unlike most nonmetals, this element with the atomic number 5 is an electrical conductor
Answer: Boron