Properties
What is an intensive property?
Property that does not depend on a physical substance
What is the definition of a molecule?
Small substance made of one or more atoms.
Which element is B on the periodic table?
Boron
What are the 3 subatomic particles?
Protons, Neutrons, and Electrons
What is a subscript and a coefficient?
The coefficient is a constant number in front of an element.
The subscript is the tiny number under the symbol that tells you the amount of atoms.
What are the four different properties?
Physical, chemical, intensive, extensive
What is the definition of an element?
A basic part of a whole; made up of only 1 type of atom
What is the atomic mass of nickel?
58.693
What 2 subatomic particles are found in the nucleus of a cell?
Protons and Neutrons
A subatomic particle is smaller than an atom. A particle is a small portion of matter.
What are the reactants in a chemical reaction?
The reactant is the starting material in a reaction that changed.
What are three physical properties?
Melting/boiling point, shape, density, magnetism, color, malleability, solubility
Physical properties are characteristics that we can observe or measure without changing the substance
What is the definition of volume and mass?
Volume: Amount of space an object takes up
Mass: Amount of matter making up an object
What do the different sections in the periodic table tell you?
What type of element are they
2 electrons
What is the product in a chemical equation?
The product is the result of a chemical reaction.
What are three chemical properties?
Rust, flamibility, reactivity
Chemical properties are a substances ability to undergo changes that transform it into a new substance
What is the law of conservation of mass?
Mass cannot be created or destroyed, only transferred.
How would you find the number of neutrons in an element?
Subtract the protons from the atomic mass.
What is a valence electron?
They determine how an atom will bond; on the outermost shell of a Bohr model.
Balance this equation:
H2+O2 -> H2O
2H2+O2 ->2H2O
If the property can be observed without changing the substance into something new, what type of property is it?
Physical
What is the definition of a crystal?
A solid material whose constituents are arranged in a highly ordered microscopic structure.
How many neutrons are in Xenon?
78 neutrons.
What is the mass of an electron?
1/2000 AMU
Mass is the amount of matter an object takes up. Matter is anything that has mass and takes up space.
Balance this equation:
C2H+O2 -> CO2+H2O
2C2H6+7O2 -> 4CO2+6H2O