Atoms And Bonding History And Review

Front 1

What did Democritus discover about atoms

Back 1

Stated that all matter can be divided into smaller and smaller particles until a single, individuals particle is reached. He named this particle atomos which means indivisible

Hint 1

Cutting into small pieces. Atomos

Front 2

What did Dalton discover about atoms

Back 2

Stated that all matter is made up of tiny indivible particles called atoms, and all atoms of a given element are identical. Atoms of differenr elements are different. During chemical reaction, no atoms are created or destroyed.

Front 3

What did Thomson discover

Back 3

Atom contain negatively charged particles called electrons and the rest of the atom is positively charged to keep it neutral

Front 4

What did Rutherford discover?

Back 4

At the centre of the atom is a very small, dense mass called the nucleus. A cloud of electrons surround the nucleus and most of the atom is empty space.

Front 5

What did Bohr discover about atoms?

Back 5

Electrons can only be found in specific orbits. When atoms jump between orbits they change colour.

Front 6

What was the nickname given to Bohr's model?

Back 6

Planetary model

Hint 6

Shaped like planets

Front 7

What was the nickname given to Daltons model?

Back 7

Billard board model

Front 8

Where is a proton located in an atom?

Back 8

The nucleus

Front 9

Where are the neutrons located in an atom?

Back 9

The nucleus

Front 10

Where are the electron located in an atom?

Back 10

In orbits around the nucleus

Front 11

What is the charge and mass of a proton?

Back 11

Charge: +1

Mass: 1 amu

Front 12

What is he charge and mass of an electron?

Back 12

Charge: -1

Mass: less than 0 amu

Front 13

What is the charge and mass of a neutron?

Back 13

Charge: 0

Mass: .5 amu

Front 14

What happens when you change the number of protons in an atom?

Back 14

This changes the element

Front 15

What happens if you change the number of electron in an atom?

Back 15

This creates an ion

Front 16

What happens when you change the number of neutrons in an atom?

Back 16

This creates a different isotope of the same element (radioactive, neutral)

Front 17

How do you make a positive ion?

Back 17

Remove electrons from the atom

Front 18

How do you make a negative ion?

Back 18

Add electrons to the atom

Front 19

Define: atomic number

Back 19

The number of protons in an atom

Front 20

Define: atomic mass

Back 20

The mass of all the protons and neutrons in an atom

Front 21

Define: Mass number

Back 21

The number of protons and neutrons in the nucleus

Front 22

How can you determine the number of protons?

Back 22

The atomic number

Front 23

How can you determine the amount of electrons?

Back 23

In neutral atoms, look at the aromic number

Front 24

How do you determine the number of neutrons in an atom?

Back 24

Subtract the atomic number from the mass number

Front 25

How many electrons fit in the first (closest to the nucleus) orbit?

Back 25

2

Front 26

How many electrons fit in the second orbit?

Back 26

8

Front 27

How many electrons fit in the 3rd orbit?

Back 27

8

Front 28

How many electrons fit in the 4th orbit?

Back 28

18