Atoms
What is the total charge of an atom?
0, it should be neutral.
What does the atomic number represent?
The total number of protons or electrons.
Are metals going to form cations or anions?
Cations
All chemical equations should be _____?
Balanced
What is the name of the tool that organizes all known elements?
Periodic Table
Which part of an atom carries a positive charge?
Proton
What is a group?
A column
Metals are ductile which means:
They are able to be drawn into a wire.
What is the mass of NaCl?
58.4
What is the balanced equation of this reaction:
NaHCO3 ------> Na2CO3 + H2O + CO2
2NaHCO3 ------> Na2CO3 + H2O + CO2
What makes up the majority atomic mass?
Protons and Neutrons
What is Na?
Sodium
What is an alloy?
A mixture of two or more chemical elements, where at least one is a metal.
What percentage of the mass is chlorine in NaCl?
60.7%
What is a closed system reaction?
A system in which no substances can enter or leave during a reaction.
Which parts of the atom cancel each other out in regards to charge?
Protons and Electrons
What is an easy way to determine whether an atom will need to lose or gain electrons?
Check their group number.
Are alloys stronger or weaker than pure metals?
Stronger
What are the substances on the left side of the arrow called?
Reactants
What are the names of the products in this equation:
NaHCO3 ------> Na2CO3 + H2O + CO2
Sodium carbonate, water, and carbon dioxide
What is the order of electron configuration in the electron shell?
2, 8, 8, 2
Who invented the periodic table?
Dmitri Mendeleev
Metals are good electrical conductors because of ______ _______.
Delocalized electrons.
What is the empirical formula?
The simplest, most reduced whole-number ratio of atoms of each element in a chemical compound.
What is the empirical formula for C8H10?
C4H5