Atomic Struture

Question 1

Look at definitions flashcards

Question 2

Why does the atom as a whole have no electrical charge

Answer 2

An atom has no over-all charge, because it has an equal number of protons(positive) and electrons (negative) therefore, the charges cancel out

Question 3

History of the atom
State ?
Dates?

Answer 3

Democritus
JJ Thompson- 1897
Rutherford-1911
Chadwick’s-1932
Today’s

Question 4

Democritus

Answer 4

Substances are made up of atoms (small indivisible particles)

Question 5

JJ Thompson

Answer 5

Positive sphere of charge with electrons embedded in it

Question 6

Rutherford

Answer 6

Electrons orbit a positive sphere (nucleus)

Question 7

Chadwick’s

Answer 7

Discovered the nuetron

Question 8

Today’s

Answer 8

Nucleus containing protons and neutrons, electrons orbiting in shells around the nucleus

Question 9

Where are protons and neutrons found?

Answer 9

The nucleus

Question 10

What are protons,neutrons and electrons?

Answer 10

Subatomic particles

Question 11

What are arranged in shells and how do you work out the number of neutrons

Answer 11

Electrons
Mass number - atomic number

Question 12

How many protons ,neutrons and electrons are in
^23
Na
^11

Answer 12

11 protons
11 electrons
12 neutrons