Chapter 3.1 Digital Lesson and 3.1 notes Flashcards
How many types of atoms are there
118
Where are neutrons located
Center of an atom
Define atom
The smallest unit of an element that maintains the properties of that element. Building blocks of matter
Define electron
A subatomic particle that has a negative charge
Define nucleus
An atoms central region which is made up of protons and neutrons
Define atomic number
The number of protons in the nucleus of an atom
Electron cloud
A region around the nucleus of an atom where electrons are likely to be found
Mass number
The sum of the number of protons and neutrons in the nucleus of an atom
Proton
A subatomic particle that had a positive charge that is located in the atom
Neutron
A subatomic particle that has no charge and that is located in the nucleus of an atom
What does atom mean in Greek
Undividable or uncuttable
What determines somethings atomic number
Number of protons
What 2 things does the atomic number tell us
How many protons the atom has, the element of the atom
What is an atoms mass number deturmined by
Number of protons and neutrons
Isotypes
Atoms with the same number of protons but different number of neutrons
Matter is made up of
Atoms
Atomic mass
Weighed average madd of all naturally occurring isotopes of the same element
Nucleus
Made up of protons and neutrons
Amu
SI unit used to express the mass of atomic particles
Where are electrons found in an atom
Electron clouds
All atoms of the same element contain the same number of
Protons
How many protons does an atom with and atomic mass of 23 and a mass number of 51 have
23
An atom has no overall electric charge because it has equal numbers of
Electrons and protons
Where are protons found
Nucleus
