sci 9 chap 1 Flashcards
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who suggested that matter is made of atoms
dalton
who proposed that atoms contain electrons?
thomson
what are negatively charged particles called
electrons
what are positively charged particles called
protons
what are particles with no charge called
neutrons
who discovered the nucleus and its subatomic particles
rutherford
who said that the nucleus was made up of protons and neutrons
rutherford
who said that electrons were located in shells around the nucleus
bohr
what do electrons have that allow them to jump back and fourth between _____ levels
energy
all atoms are made up of?
subatomic particles; protons, neutrons, electrons
protons have what charge
positive
electrons have what charge
negative
neutrons have what charge
no electric charge
what two subatomic particles clump together to form the nucleus
protons and neutrons
who said that atoms cannot be created, destroyed, or divided into smaller particles
dalton
who said that electrons occupy specific energy levels or shells
bohr
who said that most of the mass of the atom is in the tiny, dense, positively charged nucleus
rutherford
who said that most of the atom is empty space
rutherford
who said that all matter is made out of small particles called atoms
dalton
who said that all atoms of the same element are identical
dalton
who said that atoms contain negatively charged particles
thomson
who said that the nucleus contains protons and neutrons
rutherford
who said that different elements combine together to form compounds
dalton
who said that electrons move around a central nucleus
bohr
