periodic table
what is the seventh element on the periodic table
nitrogen
what is kinetic energy
energy of motion
what did Bohr do
Bohr's primary discovery was his model of the atom, often called the Bohr model
Which of the following has a positive charge?
(a) Electrons
(b) Protons
(c) Neutrons
protons
what is the last element on the periodic table
ununoctium
how would decreasing the temperature affect kinetic energy of molecules
they would move slower
what did rutherford do
Rutherford's major discovery was the atomic nucleus, a dense, positively charged core at the center of an atom
Neutrons and protons are collectively known as
(a) Nucleons
(b) Mass number
(c ) Atomic number
nucleons
what is the first element on the periodic table
hydrogen
how would increasing the temperature affect the molecules
they would move faster
what did dalton do
all matter is composed of indivisible, indestructible, and unique atoms, each with a specific weight
The number of protons in an atom is equivalent to the number of
(a) Neutrons
(b) Protons
(c ) Electrons
electrons
what does uuq stand for on the periodic table
ununquadium
describe particle motion of gasses, liquid, and solid
gasses move freely liquid move to fit in its container and solid stays the same shape
what did thomson discover
Thomson's experiments with cathode ray tubes revealed that these rays were composed of tiny, negatively charged particles, which he initially called "corpuscles". These particles, later named electrons
Name the scientist who was first to propose the atomic theory of an atom?
(a) J. J. Thomson
(b) John Dalton
(c ) Neils Bohr
john Dalton
what does LR stand for on the periodic table
Lawrencium
recording the kmt collisions between particles are perfectly elastic what does this mean
total amount of kinetic energy stays the same
what did schrodinger discover
the Schrödinger equation, a fundamental equation in quantum mechanics. This equation describes how the quantum state of a physical system evolves over time.
What was the source of alpha particles in the Rutherford scattering experiment?
(a) Hydrogen nucleus
(b) Helium nucleus
(c ) Lithium nucleus
helium nucleus