Unit 2 HW ?'s Flashcards
What is one way elements in the periodic table are arranged?
In order of atomic #
What are the 3 major types of subatomic particles?
Proton; Neutron; Electron
what is true of elements in the same column on the periodic table?
they have similar arrangements of electrons
What is a compound?
A substance made of CHEMICALLY bound atoms of 2 or more different elements
How do atoms form chemical bonds?
By sharing or transferring electrons
What is an alloy?
A solution of two or more metals
What does the subscript “2” mean in the chemical formula CO2?
Two atoms of oxygen
What is the smallest unit of an element that keeps all the chemical properties of a substance?
Atom
What is true of an atom with 8 valence elctrons?
It is stable
What is a mixture?
To or more substance NOT chemically combined
What describes silicate crystalline structures?
Sheet; isolated; ring
A framework silicate is one in which
Each tetrahedron is bonded to 4 others
A mineral is a natural, usually inorganic solid that has characteristic chemical composition,
An orderly internal structure, and characteristic physical properties
Color is unreliable for identifying minerals because
small amounts of other elements affect color, and weathered surfaces may HIDE color
What is the ability of a mineral to resist scratching called?
Hardness
A silicate mineral contains a combination of
Silicon and Oxygen
A nonsilicate mineral is one that does not contain compounds of
Silicon and Oxygen
What is true of single-chain, double-chain, and framework arrangements?
There are all types of silicate crystalline structures
Which are common nonsilicate crystalline structures?
cubes; hexagonal prisms; irregular masses
What is true of the ions at the center of nonsilicate tetrahedra?
they are NOT silicon ions
Is Gneiss foliated or nonfoliated?
Foliated
What does NOT affect the stability of rocks?
intensity of color
What factor does NOT affect how a rock melts?
light
What causes rock to change in regional metamorphism?
Rock changes result from changes in temperature and pressure
