Upgrade to remove ads
Chemistry Chapter 4 (intro to chemistry)
Terms in this set (45)
English chemist who developed the Atomic theory of matter through an experiment of gases.
from his gold foil experiments, he knew some substances give off + charged particles called alpha particles, most of the mass of an atom is in the nucleus, he reasoned that electrons in the atom are whirled around outside the nucleus, most of the atom is empty space
discovered that metals could create a beam of negatively charged particles-cathode rays
atoms of the same element that have different numbers of neutrons
What are properties of metals?
have a shiny or metallic luster
good conductors of heat and electricity
malleable (can be made into sheets
ductile (can be made into wires)
What are properties of nonmetal?
elements that are usually dull in appearance
poor conductors of heat and electricity
an atom that is electrically charged (positive or negative)
a positively charged ion
a negatively charged ion
elements that have characteristics of metals and nonmetals;
semiconductors, border the zigzag line, shiny, brittle, hard, at high temp- good conductors of electric current
the number of protons in the nucleus of an atom
(symbol is Z)
total mass of the protons and neutrons in an atom, measured in atomic mass units; the average mass of all the isotopes of an element; from periodic table; varies because of isotopes
a subatomic particle that has a positive charge and that is found in the nucleus of an atom
negatively charged particle; located outside the atomic nucleus
a subatomic particle that has no charge and that is found in the nucleus of an atom
the central core of the atom, containing protons and usually neutrons
a horizontal row of elements in the periodic table
a vertical column of elements in the periodic table
describes something that occurs or repeats at regular intervals
periodic table of elements
the scientific chart that contains an arrangement of all known elements into a particular order based upon the number of protons and other properties of each element.
His theory states all elements are composed of atoms and atoms can't be divided or destroyed
His theory states that atoms of the same element are exactly alike
His theory states that atoms of different elements are different from each other
His theory states that atoms of 2 or more elements can join together to form types of matter called compounds
Found atoms have a positive center (protons) with a negative edge (electrons)
Used the gold foil experiment and found atoms have a dense, positively charged center.
used cathode rays and found that electrons are part of the atom
atom is simplest particle of matter, combine in whole number ratios
same material, but in different forms
A: mass #
X: element symbol
Z: # of protons
Mass # = # of protons + ???
# of neutrons
# of protons = ____________ number
law of constant proportions
given compounds always have the same composition in proportion to their weight
What is an example of an allotrope?
diamond, graphite and/or bucky ball are all examples of carbon
In the cation Na +1, what happened to make it a positive ion?
The sodium lost (-) an electron.
In the anion Cl-, what happened to make it negative?
The chlorine gained (+) an electron.
mixture of two or more elements
Where are transition found on the periodic table?
In the middle of the periodic table.
Where are nonmetals found on the periodic table?
They are found on the right hand side of the periodic table.
Where are metals found on the periodic table?
They are found on the left hand side of the periodic table.
What happens when metals combine with other elements?
form cations (+)
give away electrons in ionic bonds
What happens when nonmetals combine with other elements?
form anions (-) and gain/take electrons in ionic bond
the right hand column of the periodic table
THIS SET IS OFTEN IN FOLDERS WITH...
Chapter 4 Chemistry test
Chemistry Chapter 2
Chemistry - Chapter 4
Chapter 4 chemistry study guide
YOU MIGHT ALSO LIKE...
Chap. 11 and 12
Chemistry 01 Vocabulary
Atoms, Elements, & the Periodic Table
Science Chapter 3
OTHER SETS BY THIS CREATOR
100 irregular verbs
ASVAB Word Knowledge and Paragraph Comprehension
Geometry Unit 3 Review
OTHER QUIZLET SETS
Chemistry Study of the atom
The Table and Atoms