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Atoms
Elements
Compounds
Periodic Table
Vocabulary
100
This atom has 1 proton and 1 electron.
What is Hydrogen?
100
This elements chemical symbol is Au.
What is gold?
100
A compound contains this.
What are two or more types of atoms?
100
This is how the Periodic Table is arranged.
What is by increasing atomic number?
100
A group of atoms held together by chemical means.
What is a molecule?
200
These are the positively charged particles in the nucleus.
What are protons?
200
The chemical symbol of this element is Cl.
What is Chlorine?
200
Compound are formed and broken through _________ changes.
What is chemical?
200
Elements on the Periodic Table are divided into these three categories.
What metals, nonmetals, and metalloids?
200
Two or more different atoms chemically combined.
What is a compound?
300
The overall charge of an atom that is NOT an ion.
What is neutral?
300
The chemical symbol for this element is Na.
What is sodium?
300
Water (H2O) contains this many of each atom.
What are two hydrogen and 1 oxygen?
300
Metals make up 2/3 of the periodic table and are found on the _______ side of the periodic table.
What is left?
300
A vertical column on the periodic table where elements share chemical properties.
What is a group/family?
400
Explain how to calculate the neutrons in an atom.
What is subtract the atomic number from the atomic mass?
400
The atomic number of an element is always equal to this.
What is the number of protons in an element?
400
Sodium hydroxide (NaOH) contains these atoms.
What are sodium, oxygen, and hydrogen?
400
Atomic mass number is really just this.
What is the average atomic mass of that element?
400
Horizontal rows on the periodic table.
What is a period?
500
These two subatomic particles are located in the nucleus of the atom.
What are neutrons and protons?
500
A molecule can be considered an element if it contains this.
What is one type of atom?
500
The difference at the molecular level between Hydrogen Peroxide and water is this.
What is hydrogen peroxide has ONE more oxygen than water?
500
These two groups are the MOST reactive on the periodic table.
What is group 1 and group 7?
500
The region around the nucleus where electrons are likely to be found.
What is the electron cloud?