Parts & History of an Atom

Organize these options into the right categories

Groups:

(a) Dalton

,

(b) Thomson

,

(c) Rutherford

,

(d) Bohr

• had 4 postulates

• discovered the electron

• discovered the nucleus

• discovered energy levels

• cathode ray tube

• gold foil experiment

• noticed the energies given off were always the same

• broke substances down and realized the products were always in a fixed ratio

Tags

NGSS.MS-PS1-1

Organize these options into the right categories

Groups:

(a) Dalton

,

(b) Thomson

,

(c) Rutherford

,

(d) Bohr

• 
• discovered energy levels

• 
• 
• discovered the atom

• 
• discovered the nucleus

• discovered the electron

Tags

NGSS.MS-PS1-1

Match the following

• electrons are on energy levels

• Rutherford

• proved the atom existed

• Dalton

• electron existed

• Thomson

• nucleus is a positive mass in the middle

• Bohr

• thought there was an atom

• Democritus

Tags

NGSS.MS-PS1-1

Label the parts of the atom with the scientist that discovered it

a

b

c

Bohr

Rutherford

Dalton

Thomson

Tags

NGSS.MS-PS1-1

Organize these options into the right categories.

Groups:

(a) Proton

,

(b) Electron

,

(c) Neutron

• dictates the atom's reactivity

• neutral

• if it changes, the mass of the atom changes

• positive

• negative

• if it changes, the element changes

• equals the atomic number

• dictates the atom's charge

• equals the number of protons if it is neutral

• dictate what the element is

• equals the mass minus the number of protons

Neutrons are ​ (a)   and are located ​ (b)   .

Electrons are ​ (c)   and are located ​ (d)   .

Protons are ​ (e)   and are located in the nucleus.

• heavy
• light
• in the nucleus
• on the outer shells

Neutrons are ​ (a)   .

Electrons are ​ (b)   .

Protons are ​ (c)   .

• positive
• negative
• neutral

What is the atomic mass?

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the atomic number?

Tags

NGSS.MS-PS1-1

All matter is made of what?

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5