Particles

Question 1

What are particles and name 3 examples

Answer 1

A particle is a tiny bit of matter like dust, atoms or molecules

Question 2

What are the differences between chemical and physical reactions

Answer 2

Physical changes are a substance changing state or shape, chemical changes involve creating new substances

Question 3

What happens to particles during chemical and physical changes

Answer 3

In physical changes, particles change their arrangement and movement, however in a chemical change particles break up and join together in different ways

Question 4

What are the limitations of the particle model

Answer 4

-forces between particles
-size of particles
-space between particles

Question 5

What is a molecule

Answer 5

Two or more atoms joined together by chemical bonds

Question 6

What is inside of an atom

Answer 6

A nucleus of protons and neutrons as well as orbiting electrons

Question 7

What does the atomic number mean

Answer 7

The number of protons in the nucleus

Question 8

What are isotopes

Answer 8

Atoms with the same amount of electrons and protons but a different number of neutrons, meaning they have a different mass number

Question 9

What are ions

Answer 9

Charged particles, when an atom loses or gains electrons

Question 10

Explain Daltons contribution to the atomic model

Answer 10

Suggested all matter is made from atoms and all atoms of an element are identical

Question 11

Explain Thompsons contribution to the atomic model

Answer 11

Developed the plum pudding model, finding that an atom has overall neutral charge and contained electrons

Question 12

Explain Rutherfords contribution to the atomic model

Answer 12

Rutherford concludes the atom has a positively charged nucleus and electrons orbit it

Question 13

Explain Bohrs contribution to the atomic model

Answer 13

Realised that electrons would be attracted to the nucleus and therefore had to orbit in shells