P1 SA Atoms And Particles

Question 1

The gold foil experiment:
Result 1: most particles went straight through the gold foil
Conclusion: ?

Answer 1

Most of the atom is made of empty space

Question 2

The gold foil experiment:
Result 2: a small number of alpha particles bounced straight back at the detector
Conclusion: ?

Answer 2

The mass of an atom is mostly concentrated in the centre in a dense nucleus

Question 3

The gold foil experiment:
Result 3: ?
Conclusion: the centre mass is + charged and repels the alpha particles when they pass nearby

Answer 3

Some of the particles were deflected at large angles

Question 4

What is density?

Answer 4

A way of comparing how heavy different materials are

Question 5

Equation for density is…

Answer 5

Density = mass / volume

Question 6

Units of density?

Answer 6

Kg / m cubed

Question 7

A force applied to a surface will…

Answer 7

Cause pressure

Question 8

Pressure = ?

Answer 8

Perpendicular force / area
P = F / A

Question 9

The higher the temperature, the more ____ energy the particles have - this means they move faster and collide with the sides of the container ___ frequently, and with more ___. This means there is a higher ___

Answer 9

Kinetic
More
Force
Pressure

Question 10

Syrup can demo:
The gas became ___, causing the particles to move ____ and collide with the container. The pressure ____, eventually causing the lid to pop off

Answer 10

Hotter
Faster
Increased

Question 11

What is absolute zero in degrees Celsius?

Answer 11

-273.14 degrees C

Question 12

Gas has three properties:

Answer 12

1. Volume
2. Temperature
3. Pressure

Question 13

Pressure is ____ proportional to volume

Answer 13

Inversely