Bonds
A chemical bond between two nonmetals is called a(n)
covalent bond.
How many periods are shown on the periodic table?
7
Name all 3 subatomic particles.
Protons Neutrons Electrons
A positive ion is known as a(n)?
Cation
What is the formula for density?
Density = Mass/Volume (Mass over volume)
A covalent bond is a sharing of
Electrons
What is the atomic number of neon (Ne)?
10
What is in the nucleus in the atom?
protons and neutrons
Elements with the same number of protons but different number of neutrons
Isotope
What are the elements in Group 18 called ?
Noble Gases
CO2 is this type of bond
Covalent bond.
What are the elements in Group 1 called ?
Alkali Metals
What are the 3 main states of matter?
Solid, liquid, gas
How are ions formed?
By losing or gaining valence electrons
When moving from left to right across the periodic table, what increases?
Atomic Number
Which is the correct formula for the compound chromium (II) oxide?
CrO
What are the elements in Group 2 called ?
Alkaline Earth Metals
What number do you use to find the number of protons?
atomic number
A negatively charged ion
Anion
Name the compound CF4?
carbon tetrafluoride
These bonds form when electrons have transferred among atoms.
Ionic Bonds
What is the 25th element called?
Manganese or Mn
The sum of protons and neutrons in the nucleus of an atom is known as the _________
Mass number
What is a valence electron?
Electron in the outermost energy level
Fluorine, chlorine, bromine, and iodine belong to the family of ______________
halogens
Will oxygen accept or donate electrons? How many?
Accept two electrons
What group of elements satisfies the octet rule without forming compounds (do not react)?
Noble gas
Mass # - Atomic # =
Neutrons
How many electrons are in the 3rd energy level?
18
C-14 has how many neutrons?
8