Atom Isotpe Ion Flashcards
(18 cards)
Which subatomic particles are found inside of a nucles of an atom ?
Prontons and neutrons
What formula can we use to calculate the mas number or found proton and neutrons number ?
Mass=protons+neutrons
An element is indentify by the number of ……………..of an atoms
Protons
When we have Se- or element with a negative charge we are …………
Gaining electron
When we have Se+ or electron with a positive charge we are
Losing electrons
Isotopes are atoms that have …………..
The same number of prontons and a different number of neutrons
Whicha statement is true about the relative mass of subatomic particles ?
Electron have a much smaller mass then protons
Kn isotope to determinate the average atomin mass …………..
To know the
Atomic mass of each isotopes
The relative abundance of each isotopes
The thomso’s plum pudding model was made possible by…….
Experiments with cathode ray tubes
What was the concluded about the structure of the atom as the result of the gold foil experiment ??
A positively charged on the nucleus is surranded by mostly empty space
John Dalthon theory was
Statement A: atoms are inviseble and they cannot be destroyed or broke down into smaller parts
Stement B:Atoms of an element connot be charged into smaller parts
Statement C:All atoms of one elementa have the same mass
Why statement A is no more used??
Because now we knoe that we can brake down in differents part as proton ,neutrons and electrons so they are discover so that atom is not invesible and can be broken down in differents parts
John Dalton (with the “Billiard Ball” model)
Proposed the first widely accepted atomic theory, suggesting atoms are indivisible spheres and different elements have different types of atoms.
J.J. Thomson (“Plum Pudding” model)
Discovered the electron and proposed a model where electrons were embedded within a positively charged sphere, like raisins in a plum pudding.
Descubrió el electrón y propuso un modelo en el que los electrones estaban incrustados dentro de una esfera cargada positivamente, como pasas en un pudín de ciruelas.
Ernest Rutherford (“Nuclear” model)
Conducted the gold foil experiment, discovering the atomic nucleus and proposing that most of the atom’s positive charge is concentrated in a small, dense center.
Niels Bohr (“Planetary” model)
Suggested that electrons orbit the nucleus at specific energy levels, like planets orbiting the sun.
Erwin Schrödinger (“Electron Cloud” or “Quantum” model)
Developed the quantum mechanical model, describing electrons as wave-like particles occupying regions of space around the nucleus, rather than fixed orbits.
What are atom ??
Smaller unit of matter
They are made of 3 subatomic particles that are p,n and e
The number of protons and an atom deteminate the element of atom is
What are ions ??
an atom or molecule that has gained or lost electrons, resulting in a net electrical charge.
un átomo o molécula que ha ganado o perdido electrones, lo que da como resultado una carga eléctrica neta.
