6.1 Flashcards
1
Q
Who came up with the atomic theory
A
Chemist John Dalton
2
Q
Rules of the atomic theory
A
- All matter is made of atoms. Atoms are indivisible and indestructible.
- All atoms of a given element are identical in mass and properties.
- Compounds are formed by a combination of two or more different kinds of atoms.
- A chemical reaction is a rearrangement of atoms.
3
Q
Where are all elements represented
A
Periodic tabel
4
Q
What is an element
A
A pure substance composed of only one type of atom
5
Q
What is a compound
A
Substance composed of two or more different types of atoms which are chemically bound
6
Q
What is a mixture
A
Substance composed of of 2 or more different elements or molecules that are not chemically bound
7
Q
molecule
A
The smallest particle of a substance that has all of the physical and chemical properties of that substance.
8
Q
atom
A
smallest unit into which matter can be divided without the release of electrically charged particles
9
Q
what letters repersent waht in a atomic symbol
A
A=Mass number
Z=Atomic number
X=Chemical symbol
