Physical and Chemical Change
All matter is made up of these, the fundamental building blocks of everything.
What are atoms?
What is none?
Hydrogen and Helium make up this much of the matter in the universe.
What is 98%?
This word means the same thing as stable.
What is inert?
Mixing two substances together is an example of this type of change.
What is physical?
Physical changes are easily reversible through these kinds of means.
What are physical?
Most of the mass of an atom is found here.
What is in the nucleus?
Hydrogen has 1 of each of these in its neutral state.
What is protons and electrons? (Remember: Hydrogen does not have any neutrons)
The first stable number of electrons for an atom is this?
What is 2?
If you start with 375 grams at the start of a reaction, this is how much you will have at the end of a reaction.
What is 375 grams?
Changes in state of matter are examples of this kind of change.
What are physical?
Because protons and electrons have opposite charges, they do this.
What is attract?
An atom's atomic number is equal to this.
What is the number of protons?
Hydrogen is typically found in this form in nature.
What is H2 or a hydrogen molecule?
This law states that particles cannot be created or destroyed, just changed into different forms.
What is the law of conservation matter/mass?
Baking a cake is an example of this kind of change.
What is chemical?
Electrons weigh roughly this much.
What is 0.00055 u?
This is helium's atomic number.
What is 2?
These types of bonds consist of electrons being shared between atoms.
What is covalent?
When wood is burnt, it chemically changes into this. (List three)
What are: smoke, ash, heat, light, gas?
Steel wool gains mass when burned because iron bonds with this in the atmosphere, forming rust.
What is oxygen?
This is why matter seems solid, even though everything is mostly empty space.
What is electron clouds repulsing each other?
If helium were to somehow lose a proton, it would be come this.
What is hydrogen?
This is what chemistry is all about.
This is how many elements make up the 2% of the universe not made up by hydrogen and helium.
What is 116?