問題一覧
1
It is the belief that atom is the simplest form
atomism
2
The total number of neutrons and protons present in the nucleus of an atom of an element
mass number
3
Parts of cathode ray tube:
cathode , anode , high voltage , fluorescent screen
4
According to this law, if two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in ratios of small whole numbers
law of multiple proportions
5
The number of protons in the nucleus of each atom of an element
atomic number
6
Different kinds of matter consist of different types of ______ of atoms
arrangements
7
A device used to investigate the phenomenon of radiations
cathode ray tube
8
It is the emission and transmission of energy through space in the form of waves
radiation
9
Explain how cathode ray tube works: ✅
✅
10
According to this law, different samples of the same compounds always contains its constituent elements in the same proportion by mass
law of definite proportions
11
Atoms that have the same atomic number but different mass numbers
isotopes
12
A moving charged body behaves like a ______ and can interact with electric and magnetic fields
magnet
13
It is the basic building block of matter
atoms
14
He was a Greek Philosopher and a central figure in the development of philosophical atomism and of the atomic theory
Democritus , 400 bc
15
It is the forerunner of the television tube
cathode ray tube
16
Postulates of Dalton’s Atomic Theory: ✅
✅
17
According to this law, matter can not be created or destroyed
law of conservation of mass
18
It is the belief that indivisible and indestructible atoms are the basic components of all matter in the universe
atomism
19
Book by John Dalton
a new system of chemical philosophy , 1808
20
These are tiny, uncuttable, solid particles that are surrounded by empty space and constantly moving at random
atoms