He proposed that all matter was made up of individual particles or solid spheres.
Who wasDalton
100
Protons, neutrons and electrons are these . . .
What are subatomic particles?
100
An atom can move from energy level to energy level when . . .
What is gain or lose energy?
100
All elements have variations of these.
What are isotopes?
100
Atoms of the same element have this in common.
What is # of protons?
200
He liked to use the concept of a solar system to explain the orbits of electrons.
Who is Bohr?
200
This particle is least massive.
What is an electon?
200
Scientists use this model to predict the possible location of an electron.
What is the electron cloud?
200
To figure the neutrons in any given atom, you subtract the atomic number from this.
What is the atomic mass?
200
An atom is in this "mood" when it has moved from the ground state to an orbital with higher energy.
What is excited?
300
Aan atom's nucleus is where the positive charge is located," he said.
Wh is Rutherford?
300
All atoms of an element have the same . . .
What is atomic number?
300
It's the most stable electron configuration.
What is lowest energy level?
300
If an element has 8 protons and a mass of 16 the element has this many neutrons?
What is 8?
300
An atom with 7 protons and 10 electrons will carry a charge?
What is a -3 charge?
400
Electrons don't orbit the nucleus. They are found here.
What is the electron cloud? Modern Atomic theory
400
Almost all mass of an atom is found here.
What is the nucleus?
400
A region of space around the nucleus of an atom.
What is an orbital?
400
This isotope causes some heavy water.
What is deuterium?
400
Sometimes an element will show this when its electrons move from a higher energy level to a lower energy level - showing that energy has been lost.
What is emit light.
500
He confirmed that the nucleus of an atom has neutral neutrons.
Who was James Chadwick?
500
The atomic number of Californium is . . .
What is 98?
500
All the electrons are found in the lowest energy levels.
What is ground state?
500
This uranium has an atomic mass 235. So it must have this number of neutrons?
What is 143?
500
I am an element who has the same number of protons as the days in the month of January. I also helped Mendeleev when ho organized the table of the elements.