Investigation 1
What happens when I have a positive and negative charge?
They attract
How do we represent a strong force?
Large arrows
What is the continuous model of matter?
It stated that all matter can be divided into smaller pieces of that matter indefinitely
Why do scientists constantly revise their models?
Experiments give scientists new evidence to improve their models
What subatomic particle defines the element?
(Protons, neutrons or electrons)
Protons
What happens when I have a positive and positive charge?
They repel
If A is a positive object the electric field will be (pointing towards/ pointing away) from the object.
Pointing away
What is the particle model of matter?
It stated that matter is made up of tiny particles
The current model of the atom is the probability model of the atom. What do the dark and light regions around the nucleus represent in this model?
Dark is where you are more likely to find electrons, light is where you are less likely to find electrons.
How can I change the charge of the atom without changing the element?
Add or remove electrons
What happens when I have a charged object and a neutral object?
They attract
What two factors affect electric force?
Distance and amount of charge
What two experiments helped us to prove that the particle model of matter was the correct model of matter?
Mixing ethanol and water and the syringe experiment
JJ Thompson conducted a cathode ray experiment. What did he discover about atoms during this experiment?
He discovered electrons!
He also discovered that electrons were negatively charged and much smaller than the atoms themselves.
An atom has 5 protons, 6 neutrons and 4 electrons. What is the atomic mass of the atom?
5+6=11
An object attracts to both a positively charged balloon and a negatively charged balloon. What is the charge of the object?
Neutral
How does distance affect electrical force?
The further the object the weaker the force
If I pump up a balloon with air will the mass of the balloon increase, decrease or stay the same?
Increase
In the gold foil experiment 1 out of every 10,000 alpha rays shot back. What did this give evidence for?
That there was a dense positive charge in the center of the atom
An atom has 5 protons, 6 neutrons and 4 electrons. What is the charge of the atom?
5-4= 1+
Positive 1
Why does the hair on a wig stand up on a van de graaf?
The van de graaf and the wig have like charges so they repel.
In Franklin's bells, why does the ball initially start moving?
Can 1 becomes charged due to the van de graaf. The neutral ball then becomes attracted to the charged can and moves towards the can
How did mixing water and ethanol prove that the particle model of matter was the correct model of matter?
Since adding 5ml of water and 5ml of ethanol did NOT give us 10ml we can infer that the water particles are smaller than the ethanol particles and fill in the gaps of the ethanol particles
In the Bohr model of the atom, which electrons have the most energy?
The electrons in the orbitals farthest away from the nucleus
If I place a neutral atom next to a positive charge, what happens to the electron cloud?
It will deform towards the positive charge since the electron cloud is negative