Properties & Changes
A property of a substance that can be observed without changing it into a new substance.
A physical property
Matter made of only one kind of atom. (Ex. hydrogen)
Elements
Groups 3-12 are also known as _____ _____.
Transition Metals
What is Potassium's atomic number?
19
Metalloids are between metals and non-metals, along what is called the ________.
stairstep
A property of a substance that describes its ability to change into new substances.
A chemical property
Matter made of two or more substances mixed together but keep their own properties. (Ex. salt water)
Mixtures
Metals are on the ____ of the periodic table, nonmetals are on the _____.
Left, right
Flourine is in group 17. It would be violently reactive with what other element: Promethium, Rubidium, or Thallium?
Rubidium (in Group 1)
The Lanthanide Series is named after the element _____.
Lanthanum
Which is a physical property: Solubility, ability to rust, or reactivity?
Solubility
Matter with a definite composition and characteristic properties. (Ex. water)
Substance
Barium is in Group 2, Period _____.
6
The atomic number tell you the number of _____ in an element.
protons
Arsenic is: a non-metal, a metalloid, or a metal?
Metalloid
Which is a chemical property: Melting point, boiling point, or flammability?
Flammability
Matter made of two or more elements that are chemically combined. (Ex. salt)
Compounds
What series is named after Actinium?
Actnide Series
What is the atomic mass of gold?
196.97
A dead log rots in the woods. This is most likely to be: a physical change or a chemical change?
A chemical change
Changes of state are ______ changes, while burning/combustion is a ______ change.
physical, chemical
You can see the different parts of a ____ mixture, but not in a ____ mixture. (Ex. 1: trail mix Ex. 2: pulp-free orange juice)
Heterogeneous, homogeneous
Group 17 is also known as the _____ _____?
Halogen Group
Atoms of an element with different numbers of neutrons are called _____?
Isotopes
When thermal energy is absorbed during a change of matter, then it is an _________ change.
endothermic