A
B
C
D
E
100
When the object is electrically neutral, the total charge of an object is:
Zero.
100
Isotopes are atoms having the:
Same atomic number but different mass numbers.
100
A spectroscope is:
An instrument that separate the liht given off by electrons into different colors.
100
The number of electrons that may be held in the 3rd energy level is:
8.
100
Definition of Noble Gases and their "nicknames."
Def: Their atoms do not form chemical bonds with other atoms. Nickname: Inert Gases.
200
Horizontal rows on the PT:
Periods.
200
Vertical columns:
Groups.
200
Metalloids are:
Elements on the PT that have similar properties.
200
Helium belongs to:
The noble gases.
200
Alkali Metals are the most
active metals.
300
When atoms transfer or share electrons, they
form a chemical bond.
300
What is a molecule?
A group of atoms that create a compound held by covalent bonds.
300
The chemical formula:
The number and type of each element in a compound.
300
An ion:
When it becomes a particle after losing or gaining electrons
300
An oxidation #:
The # indicating the charge on an atom when an electron is lost, gained, or shared.
400
Mass number:
# of protons + # of neutrons in the nucleus of an atom.
400
Non-metals:
Solid elements.
400
Halogens:
The group of elements that tend to be found as toxic gases or liquids in their pure form.
400
When chemical bonds form...
Energy is released.
400
Covalent bonds:
Type of chemical bond formed by the sharing of electrons.
500
What's on the left side of the PT?
Strong electron donors.
500
The 2 factors that determine the properties of a compound:
The molecule structure and the chemical formula.
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