Chemistry 1
Used to measure the mass of the particles in and element
AMU
Elements found in their pure form do not normally combine with other elements
noble gases
An object that can be easily shaped into any angle is ____________
malleable
Neon and helium are ___________
noble gases
Mercury is the only metal in a __________form.
liquid
What do we call the man-made combinations of elements?
Synthetic Compounds
The amount of matter inside the volume
density
As the atomic numbers increase on the periodic table, the element becomes_________and ___________reactive.
heavier / less
Sodium is a:
alkali metal
When an object can be beaten into a thin sheet or a long string it is
ductile
What are the light elements with a strong reaction to any other element they come in contact with?
Alkali Metals
Compounds that have an electrical charge, because one atom has an extra electron and other atom is missing one
ionic compounds
The three major groups of elements are_____.
metals, metalloids, and nonmetals
Arsenic, antimony, and silicon are all
metaloids
The formula for density is
D=M/V
Metals first found in the rocks and minerals of the earth and prefer to join with other elements, rather than exist alone.
Alkaline Earth Metals
The result of two or more molecules joining together
molecular compounds
What are some characteristics of metal?
Strong, silver or gray, maleable, good conductors of heat, none are found in gas form
clorine is a___________
halogen
The amount of elements in each compound is always
The Same
The number of protons that are in an element
Atomic Number
The measurement of the space inside an object
volume
Water’s chemical formula is__________
H2O
iodine is a _______________
halogen
Compound means
to put together