Ch. 15
Sodium Hydroxide dissolves in water is a ___.
Physical Property
Chemical Property
Physical Change
Chemical Change
Physical Change
The central core of an atom is called the ____.
Nucleus
Bromine is the only ___ nonmetal.
Liquid
Horizontal Rows on the periodic table are called ___.
Periods
What is Mrs. Picketts first name?
Shelby
Wood rotting is a _____.
Physical Property
Chemical Property
Physical Change
Chemical Change
Chemical Change
What does the roman numeral on the periodic table tell you?
# of valence electrons
What is part of the iron triad?
iron, cobalt, nickel
Elements that lie along the stair step line are called ___.
Metalloids
How old is Mrs. Pickett?
27
Substances are either ____ or ____.
If an atom has 26 protons, 26 electrons, and 30 neutrons... what is the Mass number?
56
An allotrope of carbon that is soft and can be used as a lubricant is ___.
Graphite
Group 2 is called ____.
Alkaline earth metals
What are Mrs. Pickett's kids names?
Eleanor & Margot
A description of an object based on what you observe with your senses is _____.
Physical properties
What is the charge of an atom? Why?
Neutral
# of Protons = # of electrons
Why is Hydrogen grouped with the alkali metals?
it has one valence electron
elements in groups 3-12 are called ___.
transition elements
What is Mrs. Pickett's husband's name?
Ryan
How much CO2 is produced from the decomposition of 200 g of CaCO3 is 110 g of CaO are produced?
CaCO3 --> CaO + CO2
90 g
Draw a Boron atom. Its atomic number is 5 and its mass number is 11.
Protons= 5
neutrons=6
2 levels
5 total electrons
In the gaseous state ___ form diatomic covalent molecules.
halogens
the elements that seem to be disconnected from the period table are called ___.
Inner transition metals
When is Mrs. Pickett's birthday?
Decemeber 23rd