TOEFL کے الفاظ

mass of substance per mole

摩尔质量

si unit of amount of substance

摩尔；物质的量的国际单位制单位

neutral group of chemically bonded atoms

分子

electrically neutral particle in atomic nucleus

中子

element without typical metallic properties

非金属；非金属元素

carbon based compound in organic chemistry

有机化合物

loss of electrons or increase in oxidation state

氧化；氧化反应

compound of oxygen with another element

氧化物

undergo or cause increase in oxidation state

氧化；使氧化

small unit or piece of material

粒子；颗粒

ordered chart of chemical elements

元素周期表

logarithmic measure related to hydrogen ion activity

pH；酸碱度指标

instrument for transferring small liquid volumes

移液管；移液器

polymer based material shaped during manufacture

塑料

substance with large molecules of linked units

聚合物；高分子

agreement among repeated measurement results

精密度

substance formed by a chemical reaction

生成物；反应产物

positively charged particle in atomic nucleus

质子

material with fixed chemical composition

纯净物

undergo a chemical change

发生化学反应

starting substance changed in chemical reaction

反应物

speed of change in reactants or products

反应速率

gain of electrons or decrease in oxidation state

还原；还原反应

reaction that can proceed in both directions

可逆反应

protective eyewear enclosing eye area

安全护目镜

containing equilibrium limit of dissolved solute

饱和的

digit retained to express measurement detail

有效数字

state with definite shape and volume

固体

equilibrium amount that can dissolve under conditions

溶解度