Chemistry Vocabulary
When one element "replaces" another element in a compound
What is replacement?
Matter can enter from or escape into the surroundings
What is an open system?
If you want to balance an equation, you must do this
What is change the coefficients?
What is the difference between mass and weight?
Mass is what the object is made of and weight is the pull of gravity.
Atomic numbers of an atom are the same as the number of what in an atom?
What is protons?
When 2 or more elements or compounds "combine" to make a more complex substance
What is synthesis?
A number placed in front of a chemical formula in an equation
What is a coefficient?
How many electrons typically complete the outer valence of an atom?
What is 8?
The smallest pieces of matter are called __________.
What is atoms?
Carbon, Hydrogen, and Oxygen are what on the periodic table?
What is nonmetals?
A reaction that occurs when compounds "break down" into simpler substances
A mix of different elements resulting in a new substance
What is compound?
Atoms are made of tiny particles. Name them.
What are protons, neutrons, and electrons?
What type of particle holds the protons and neutrons together in the nucleus?
mesons
Atoms share ____________.
What are electrons?
This states that during a chemical reaction, "matter is not created or destroyed"
Matter does not enter or leave
What is a closed system?
A neutron has what kind of charge?
What is neutral?
Atoms are neither ______________ or __________.
What is created or destroyed?
Why does hydrogen have an atomic number of 1?
because it only has one proton
A way to show a chemical reaction using symbols instead of words
What is a chemical equation?
What is the charge of an electron?
What is negative or -1?
When two atoms share electrons, what do we call the union?
What is covalent bonding or bonding?
What is the coefficient in this compound
3 NaClOHC ?
What is 3?
Some atoms have more ___________, which makes it an isotope and gives it a negative charge
What are electrons?