Chpt 29&30 Flashcards
What is the definition of an atom.
It is the smallest particle of an element which still retains the properties of that element.
What is an example of an element
Copper.
What type of microscope allows you to see atoms.
Electric microscope.
What is the name for the particles inside an atom.
Sub atomic particles.
Which one of the sub atomic particles are negative
Electron.
Which sub atomic partial is nuetral.
Neutron.
Which sub atomic particle is positive
Proton
What is the mass of
A) an electron
B) a proton
C) neutron
A) 1/200unit
B) 1unit
C)1unit
What unit is the mass of the sub atomic particles measured in
G
What did Neil Bohr propose.
That electrons travel on orbits around the nucleus.
Are atoms + or -
0
What is the ratio of protons and electrons in an atom
Support answer) (hence……………..
=
Hence atoms are nuetral.
What is the name given to the number of protons in the nucleus.
Atomic number
Define atomic number
The number of protons in the nucleus
WhAt is the mass number of an atom
Number of protons + number of neutrons.
Atomic number (form)
If the a.n. =22
That means there is 22 electrones and 22 protons in the element
What is the formula for the number of neutrons
Mass number- atomic number
What is the periodic table of elements
List of elements increasing in atomic number
How are elements in the periodic table arranged
Elements with similar properties are arranged one under the other
How many groups are there in the periodic table of elements
8
What are alike between all the elements in the same group
They all have the same amount of electrons in the outer obit
What are atoms?
Atoms are tiny particles that substances are made up of.
