Who did what?! [20 characters]?!


Question: Who did what!?! [20 characters]!?
I have chem homework!.!.!.
and i cant figure out the answers to these!.
I KNOW ITS A LOT BUT THANK YOU!

here are the people :

MAX PLANCK
DMITRI MENDELEEV
NELIS BOHR
LOUIS DE BROGILE
WERNER HEISENBERG
JOHN DALTON


Who stated that particles in motion could behave like waves ; developed an equation to calculate the wavelength!.

Who developed the first periodic table in which the elements were arranged by atomic number!.

who stated that electrons moved in concentric circular paths or orbits around the nucleus; is credited with the planetary model f the atom; stated that electrons in atoms have a fixed amount of energy!.

who developed the uncertainty principle which states that it is impossible to know exactly both the velocity and the position of a particle at the same time!.

who developed the idea that energy can chagne only by small, discrete units known as quanta!.

who studied in what ratios diff!. elements combine in chemical reactions; formulated hypotheses and theories to explain his observations; developed an atomic theory!.

who perfromed an experiment to more accurately determine the mass and charge of the electron

who developed an equation to describe the ocation and energy of an electron in a hydrogen atom; dveloped the quantum mechanical model of the atom!.

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Answers:
who developed the uncertainty principle which states that it is impossible to know exactly both the velocity and the position of a particle at the same time!. - WERNER HEISENBERG

Who stated that particles in motion could behave like waves ; developed an equation to calculate the wavelength!. - LOUIS DE BROGILE

who developed an equation to describe the ocation and energy of an electron in a hydrogen atom; dveloped the quantum mechanical model of the atom!. - NEILS BOHR

Who developed the first periodic table in which the elements were arranged by atomic number!. - DMITRI MENDELEEV

who developed the idea that energy can chagne only by small, discrete units known as quanta!. - MAX PLANCK

who stated that electrons moved in concentric circular paths or orbits around the nucleus; is credited with the planetary model f the atom; stated that electrons in atoms have a fixed amount of energy!. - JOHN DALTON



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