Solid, Liquid, Gas
What do the particles in a solid look like
They are very compact and have a lot of vibrations
Name an element on the periodic table.
Any of the 118- Hydrogen, Helium, Oxygen, ect.
Is the color of something a chemical or physical property?
Physical, because that is something that you can tell by just looking at the element.
What is the rate?
The rate is how fast a reaction is moving per unit of time.
Define either a solid, liquid, or a gas
Solid- Has a definite shape and volume, particles are very compact and have lots of vibration
Liquid- Has no definite shape but does have a definite volume, particles are a little bit spaced out, and have a little bit of vibration
Gas- no definite shape or volume, very spaced out and does not have much vibration
How do you change a solid into a liquid?
You add thermal energy
Name a metal on the periodic table.
Any of the 95 metals, Copper, Sodium, Nickel, ect.
Is the oxidation of something a chemical or physical property?
Chemical because you need more research to tell this.
Describe one part of a chemical formula
Coefficient, describes how many of one thing we have.
Subscript, describes how many molecules will be in one compound
Reactants, the things that form the product
Product, the thing that the reactants form
What is a molecule
The smallest thing in a substance, that has two or more atoms.
When can a liquid start boiling?
When every single particle has enough energy to vaporize, it reaches its boiling point.
How reactive is family 8A
Not reactive at all because it has 8 stable valence electrons.
Give an example of a physical change.
Melting ice into water, melting a penny, ect.
What is activation energy?
Activation energy is the minimum amount of energy needed to start a reaction.
What is a valence electron?
The outermost electrons that have the highest amount of energy
Why did the hot water balloon in the balloon lab get bigger than the cold water ballon?
The hot water added thermal energy to the balloon, so the particles separated and caused the balloon to expand.
What might be an element that has a full electron shell, then one extra radnom valence electron?
It will probably give it to something that has 7 valence electrons and needs one more.
If someone took an ice cube and melted it into a puddle of water, would that be a chemical or physical change and why?
Physical change because you are not changing the outcome from the initial outcome, it is still the same material as before, just in a different form.
How can you tell if a reaction has occurred?
You can look at the properties like, color, texture, conductivity, size, and see if it has changed since the start. You can also see if any energy has been used.
What is an electron dot diagram?
Shows the symbol of the element, and is surrounded by dots that represent valence electrons.
What is the name of the type of solid when the particles are arranged neatly.
Explain why the Hindenburg Blimp exploded down when they used Hydrogen instead of Helium.
The blimp exploded because they used the cheaper option, Hydrogen which is a very explosive gas, instead of Helium which is not explosive and would have been better.
If someone took a molecule of sodium and combined it with a molecule of chlorine, would that be a chemical change or physical.
It would be a chemical change because you are creating a whole different thing.
How does an enzyme change the rate of a reaction?
An enzyme is something that speeds up a reaction by finding two things and making them hit each other and start a reaction.
Define a chemical equation
A way to show a chemical reaction using symbols instead of words.