Atomic Structure
What is the charge of protons, neutrons, and electrons?
Protons are positive
Neutrons are neutral, no charge
Electrons are negative
What is a molecule?
A group of atoms of the SAME
element bonded together.
What are the periods of the periodic table?
Horizontal rows
What are subscripts?
A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
What state of matter has a fixed volume and a fixed shape?
Solid
Where in the atom are neutrons?
The center of the nucleus.
What is a compound?
Group of two or more atoms of DIFFERENT elements bonded together.
What are the columns of the periodic table?
Vertical columns, group with similar properties
What side of the equation is the reactants?
What side of the equation is the products?
Reactants= left side
Products= right side
What state of matter has the most energy?
Gas
What is atomic number?
What is the atomic mass?
Atomic Number: Number of Protons
Atomic Mass: Number of Protons+ Neutrons
H2O
Compound because there are 2 or more different elements, Hydrogen and Oxygen.
What are the properties of metals?
Shiny, Good conductors of heat and electricity, react with acids, malleable (bendable)
What is the Law of Conservation of Mass?
Matter cannot be created or destroyed.
Reactions will have the same number of elements on products side and the reactants side.
What phase change is liquid to gas?
Evaporation
Why aren't electrons counted in the atomic mass?
Electrons are very small and there mass is insignificant to the final mass of an atom.
What is the difference between a monoatomic element and a diatomic element?
Monoatomic elements are 1 copy and do not have any subscript after the symbol.
Diatomic elements have 2 copies of the same element and have a subscript 2 after the symbol.
What are the properties of nonmetals?
dull, brittle, poor conductors of heat and electricity
How many Oxygen atoms are present on the reactants(left side) of the equation?
6CO2+ 6H2O --> C6H12O6 + 6O2
18 Oxygen atoms
Condensation is the process of matter going from ________ to ___________
Gas to Liquid
What is an isotope?
An element with the same number of protons and electrons, but a different number of neutrons.
What is the difference between heterogeneous and homogeneous mixtures?
Heterogeneous Mixture:A mixture in which different materials can be easily seen and separated. Example: Salad
Homogeneous Mixture: A mixture in which substances are evenly distributed and combined. Example: Lemonade
What is 1 example of an element that is a metal and 1 example of an element that is a nonmetal?
Metals: Li, Na, K, Ti, Mn, Ca
Nonmetals: He, Ar, O C, I, Ne
Is the chemical equation balanced? Why?
2H2+ O2 --> 2H2O
Yes the equation is balanced.
Reactants side: 4 H, 2 O
Products side: 4 H, 2 O
What is the equation for density
Density= Mass/Volume