Atomic Structure and Chemical Equations.
What kind of charge does an electron have?
negitive charge
How many Periods are there?
Seven
Whats an element?
A pure substance found on a periodic table.
Whats a producer.
An organism that makes its own food.
What is a physical change.
Any change that doesn't change its chemical composition.
What are the three parts of an atom.
Protron
Neutron
Electron
How many families are there?
eighteen
Whats a compound?
A substance composed of two or more elements.
Name three types of Energy maps.
Food chain, food web, energy pyramid.
What is the formula for density.
Density=Mass/Volume.
Is this a balanced equation?
3BH2 + 5OH3 -> B3 + 5HO5
No
What info does the atomic number give
How many protons it has. How many electrons it has.
Whats an organic compound?
Any compound that contains carbon and at least one element of the following.
Hydrogen, Oxygen, Phosphorus, Sulfur,
or Nitrogen
Whats a predator.
An organism that hunts other organisms for energy.
How much density does an object need in order to float.
A density above 1.
What law is this?
Matter cannot be created or destroyed.
Law of conservation of mass
What is the lightest element in the metalloids section.
Use periodic table.
Boron
Whats a mixture?
Composed of two or more different elements or compounds that are not chemically combined.
Whats prey
An organism that is hunted by a predator and gives energy to it.
What are signs of a chemical reaction?
High change in temperature, bubbling, change in the smell, change in color, gas production, changing states of matter(solid to liquid ect).
What is a coefficient?
A number placed in front of an element that multiplies how many of that element in the compound there are.
What are the three sections in a periodic table?
Metals, Nonmetals, Metalloids.
What else do organic molecules include?
Carbohydrates, Lipids (fats), Proteins, and Nucleic Acids
What do food chains always start with.
the sun
Is your stomach mixing and breaking down food with acid a chemical or physical change.
Chemical reaction/change.