Retake Flashcards
(25 cards)
What is the charge of a neutron
Neutral
The charge of an proton is ?
Positive
Electron is a subatomic particles that carries a ?
Negative charge
the charge of an ion is
Variable
The charge of an atom is ?
Neutral
What does atomic number is equal to ?
Number of protons
has the smallest mass
Electron
Mass number is equal to ?
Proton+neutron
The charge of the nucleus of an atom is ?
Positive
Is the smallest unit of an element that retains its chemical properties
Atom
John Dalton theory
To present scientific evidence supporting the existence of these particles which he then called atoms
True or false all atoms of an element are identical
True
True or false Atoms of different elements can combine in simple whole number ratios
True
Is a subatomic particle is located in the nucleus of an atom
Proton
Is a substance composed of atoms with the same number of protons
Element
They have the same number of protons but different numbers of neutron
Isotopes
True or false the mass of a proton and neutron are equal
True
propose the concept of the atom as an indivisible particle
Democritus
proposed the planetary model of the atom where electrons orbit the nucleus in fixed paths and proposed the idea that electrons occupy energy levels or shells around the nucleus
Niels bohr
Discovered the electron and propose the plum pudding model of the atom and propose that electrons are found in electron clouds rather than in fixed orbits
J.J thomson
Is the modern model of the atom that describes electrons in orbitals around the nucleus
Quantum model
Develop the mathematical equations describing the behavior of electrons in an atom
Erwin schrodinger
Is the primary factor that determines an elements chemical behavior
Number of protons
True or false The mass of an electron is smaller to compared to a proton
True
