Chemistry

"The masses of elements in a pure compound are always in the same proportion". This statement originally called "Proust's Law" is known as ________.

Who formulated the atomic theory?

Who revised the atomic theory by replacing the hard, indestructible spheres imagined by Dalton and proposed the "raisin bread model" of the atom?

How does Joseph John Thomson call his model of the atom?

What is the unit for the charge of a particle?

The protons and neutrons are not considered as fundamental particles because they consist of smaller particles called________.

The elements with similar properties are placed in columns of the periodic table. These columns are commonly called _________.

What are the rows of the periodic table called?

What is the most abundant element in the human body?

What is the second most abundant element in the human body?

Which of the ff is NOT a metalloid?

Caustic soda is used in making soaps, textile, and paper. What is the another term for caustic soda?

What is used for the manufacture of explosives and fireworks?

All alkaline metals will tarnish in air except?

What alkali metal is usually used for x-ray apparatus because of its ability to allow x-rays to pass through with minimum absorption?

What is used for coating galvanized iron a corrosion resistant material?

What element is commonly used in making lasers?

What is regarded as the most unique element in the periodic table?

What is the most abundant element in the atmosphere?

What are the charges of the down, strange, and bottom quarks?