TOEFL এর জন্য উন্নত শব্দভাণ্ডার - পদার্থবিদ্যা এবং রসায়ন

a space that is utterly empty of all matter

শূন্যতা

(chemistry) to merge or be merged by a chemical bond

বাঁধা

the different elements that form something or the arrangement of these elements

সংযোগ

to heat a liquid and turn it into gas then cool it and make it liquid again in order to purify it

অবশিষ্ট করা

to press two things together or be pressed together to become smaller

চিপা

(physics) an invisible substance that makes up most of the universe's mass, detectable only through its gravitational effects

অন্ধকার পদার্থ

(physics) matter consisting of elementary particles that are the antiparticles of those of regular matter

অ্যান্টিম্যাটার

(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself

ক্যাটালিস্ট

to increase the velocity of something

গতি বাড়ানো

any substance with a pH of more than seven that neutralizes acids creating salt and water

আল্কালি

a liquid that is capable of dissolving another substance

দ্রাবক

a gas with a strong smell that dissolves in water to give a strongly alkaline solution

অ্যামোনিয়া

a hard black substance consisting of an amorphous form of carbon which is made by slowly burning wood and is used as fuel or for drawing

কয়লা

having an electric charge

চার্জড

a substance that permits electricity to pass through or along it

সংবাহী

a substance of small size and equal sides, formed naturally when turns to solid

ক্রিস্টাল

a particle with a net electric charge due to loss or gain of one or more electrons

আয়ন

referring to the combined interaction of electric and magnetic fields, often associated with waves or radiation

ইলেকট্রোম্যাগনেটিক

the process or action of splitting a nucleus into two or more parts resulting in the release of a significant amount of energy

পারমাণবিক বিভাজন

(physics) the reaction in which two nuclei join together and produce energy

পারমাণবিক একীভবন

to become gas or vapor from liquid

বাষ্পিত হওয়া

a light silver-gray metal used primarily for making cooking equipment and aircraft parts

অ্যালুমিনিয়াম

a combination of two or more metals, creating a metal that is usually stronger or more resistant

মিশ্রণ

a metallic chemical element that has a red-brown color, primarily used as a conductor in wiring

তামা

(physics) possessing the attribute of attracting metal objects such as iron or steel

চুম্বকীয়

the resistance that two surfaces moving on each other encounter

ঘর্ষণ

the gradual destruction of materials by chemical reaction, usually of metals

জারণ

(physics) the property of matter that gives it weight in a gravitational field and is a measure of its inertia

ভর

(physics) the degree to which a substance is compacted, measured by dividing its mass by its volume

ঘনত্ব

the speed at which something moves in a specific direction

গতি

a heavy soft metal, used in making bullets, in plumbing and roofing, especially in the past

সীসা

a soft, black, and highly conductive material made up of carbon atoms that is commonly used in pencils and as a lubricant

গ্রাফাইট

a heavy silver-colored and poisonous metal that has a liquid state in the ordinary temperature

পারদ

a chemical element and a silver-white metal used in making alloys

নিকেল

a gas with nearly no electrical charge that exists in the sun and other stars

প্লাজমা

a heavy radioactive metallic element used in producing nuclear energy

ইউরেনিয়াম

containing or relating to a dangerous form of energy produced by nuclear reactions

অবসীজনক

related to heat or temperature, including how heat moves, how materials expand with temperature changes, and the energy stored in heat

তাপীয়

remaining still, with no change in position

স্থির

produced artificially, typically based on its natural version

সিন্থেটিক