boron
Neutron absorber element
Boron is a chemical element, atomic number 5, a metalloid used in fiberglass, ceramics, and high-strength materials.
Borax, a boron compound, has been a household cleaner for over a century.
Boron compounds harden steel and appear in semiconductor manufacturing.
In agriculture, boron is an essential micronutrient for plants.
Essential substance, small doses
- cell wallsRigid outer layer of plant, fungal, and bacterial units
- bone healthCondition of bones
- trace elementNutrient needed minimally
- deficiencyLack of something needed
Element straddling two classes
- periodic tableSystematic display of elements
- isotopesAtomic number twins
- crystal structureOrdered atomic arrangement in solids
- high melting pointResists becoming liquid
Neutron-absorbing reactor components
- nuclear reactorsFission-powered energy generators
- shieldingProtecting from harm
- radiation protectionSafeguarding from ionizing emissions
- PWREnergy, abbreviated
Prohibited athletic drug use
- p-typeHole-majority charge carrier semiconductor
- n-typeSemiconductor with electron majority
- siliconMetalloid in electronics
- acceptorOne who takes something
dopant · junction · transistor · electronics · integrated circuits · photovoltaics · thermoelectric · energy conversion
Resistance to penetration
- superhardExceptionally resistant to deformation
- cutting toolsImplements for severing materials
- abrasivesMaterials that erode surfaces
- armor platingDefensive metal cladding
bulletproof · refractory · high-temperature · composites · reinforcement · aerospace · tennis rackets · golf clubs
micronutrient
Essential substance, small doses
- cell wallsRigid outer layer of plant, fungal, and bacterial units
- bone healthCondition of bones
- trace elementNutrient needed minimally
deficiency · soil amendment · fertilizer · crop yield · wound healing
metalloid
Element straddling two classes
- periodic tableSystematic display of elements
- isotopesAtomic number twins
- crystal structureOrdered atomic arrangement in solids
control rods
Neutron-absorbing reactor components
- nuclear reactorsFission-powered energy generators
- shieldingProtecting from harm
- radiation protectionSafeguarding from ionizing emissions
doping
Prohibited athletic drug use
- p-typeHole-majority charge carrier semiconductor
- n-typeSemiconductor with electron majority
- siliconMetalloid in electronics
acceptor · dopant · junction · transistor · electronics · integrated circuits · photovoltaics · thermoelectric · energy conversion
hardness
Resistance to penetration
- superhardExceptionally resistant to deformation
- cutting toolsImplements for severing materials
- abrasivesMaterials that erode surfaces
armor plating · bulletproof · refractory · high-temperature · composites · reinforcement · aerospace · tennis rackets · golf clubs
sp2 hybridization
Three equivalent orbital mixing
- semiconductorssilicon, semiconductor, semiconductors, silicon wafers, transistor
- neutron absorberscadmium, hafnium, gadolinium, control rods, control rod
- periodic tableperiodic table, elements, hydrogen, helium, carbon
- elementsoxygen, hydrogen, carbon, helium, nitrogen
- chemistry termscarbon, nitrogen, oxygen, sulfur, phosphorus
- main group elementshydrogen, helium, lithium, beryllium, carbon
- boric acidWeak triprotic antiseptic substance