Show:
Vocabulary 1st Level
Vocabulary 2nd Level
Atomic Structure
Periodic Table
Atomic Timeline
100
What is mass?
The amount of matter an object contains.
100
What is vapour?
The smoke produced be the particles that have been close in a close place.
100
What is an atom?
Its the smallest particle of an element.
100
How are elements arranged in the periodic table and how were they originally arranged?
Today they are arranged by the increasing of the atomic number. They were arranged be the increasing of the atomic mass.
100
Who was Democritus?
He was a Greek philosopher, he was the first person to propose the idea that matter was not definite divisible.
200
What is substance?
The amount of weigh of something.
200
What is phase?
A part of an experiment or procedure.
200
What are the 3 ways elements are named?
place, property or scientist.
200
How many periods and groups are in the periodic table?
Groups: 18 Periods: 7
200
What did J.J Thompson discover?
He discovered that there are smaller particles than the atoms. He discover the electrons.
300
What is element?
A think or liquid you use for making an experiment.
300
What is chemical symbol?
1 or 2 letters that represent an element.
300
How are elements different from each other?
The have different mass and volume.
300
What is a period and a group in the periodic table?
Period: a row Group: a column
300
What did Robert Millikan determine?
He determined the charge and mass of an electron.
400
What is a chemical reaction?
A chemical change.
400
What is chemical property?
The ability of a substance to undergo a specific chemical change.
400
What are isotopes
Atoms with the same number of protons, but different number of neutrons.
400
Who published the first periodic table?
Dimitri Mendeleev
400
What did James Chadwick Discover?
He discovered that a neutron has a mass nearly equal to that of a proton.
500
What is a compound?
A substance that contains 2 or more elements.
500
What is the law of conservation of mass?
The mass of the product = the mass of the reactants.
500
What is the difference between atomic number and mass number?
Atomic number: number of protons and neutrons. Atomic mass: number of protons and neutrons in the nucleus.
500
What is the periodic law?
When elements are arranged in order of increasing atomic number, the chemical and physical properties of elements repeat.�
500
Where was Ernest Rutherford born? Where did he study? And what prizes did he win?
He was born in New Zealand. He study in Cambridge University in England. He won the nobel prize in chemistry in 1908.