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Flashcards in Test Deck (12)
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1
Q

Atom

A

Smallest particle of an element

2
Q

What did Democritus think about atoms

Why did it not work out

A

They were invincible and indestructible

Bc they didn’t know how it would cause a chemical reaction and it lacked scientific experiment

3
Q

Dalton’s atomic theory

A

First theory to base off atoms making chemical reactions
All elements are made up of atoms
One elements atoms are different from another element
Atoms of different elements can mix together
Atoms can’t change into another element, only joined or separated

4
Q

Subatomic particles

A

Protons
Neutrons
Electrons

5
Q

Who discovered electrons

A

J.j Thompson

6
Q

Electrons

A

Negative subatomic particles

7
Q

Protons

A

Positively charged subatomic particles found in the nucleus of an atom

8
Q

Neutrons

A

subatomic particles with no charge but mass same number as protons

9
Q

Nucleus

A

Center of atom, filled with protons and neutrons

10
Q

“Elements are different because they contain different numbers of protons”

A

F

11
Q

Atomic number

A

The number of protons in the nucleus of the atom

12
Q

Isotopes

A

Atoms with same number of protons but not neutrons different mass numbers