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Chapter 1 JRW
Atoms, Elements and Compounds
66
Science
10th Grade
05/21/2008

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Term
MSDS stands for this
Definition
Material Safety Data Sheet
Term
WHMIS stands for this
Definition
Workplace Hazardous Materials Information System
Term

3 ways in which WHMIS informs workers about chemicals

Definition

1. Controlled products must have information labels in both English and French

2. Controlled products must have an MSDS

3. Workers who handle chemicals must complete an education program provided by their employer

Term
Matter is subdivided into these two catagories
Definition
Mixtures and Pure Substances
Term
The two types of mixtures
Definition
Heterogeneous mixtures (mechanical mixture) and Homogeneous mixtures (solution)
Term
The two types of pure substances
Definition
Elements and compounds
Term
Type of mixture in which the different components of the mixture are visible
Definition
Heterogeneous mixture (mechanical mixture)
Term
Type of pure substance that cannot be chemically broken down into simpler substances
Definition
Elements
Term
Type of mixture in which the different components of the mixture are not visible
Definition
Homogeneous mixture (solution)
Term
Type of pure substance made up of two or more elements that are chemically combined
Definition
Compounds
Term
Scientist who made the first model of the atom (nicknamed the billiard ball model)
Definition
John Dalton
Term
The five points of Dalton's atomic theory
Definition

1. All matter is made up of small particles called atoms.

2. Atoms cannot be created, destroyed, or divided into smaller parts.

3. All atoms of the same element are identical in mass and size, but they are different in mass and size from atoms of other elements.

4. Compounds are formed when atoms of different elements combine in fixed proportions. The tiniest particles of any compound always contain the same types and relative numbers of atoms.

5. Chemical reactions change the way atoms are grouped, but the atoms themselves are not changed in the reactions.

Term
[image]
Definition
compressed gas
Term
[image]
Definition
flamable and combustable material
Term
[image]
Definition
oxidizing material
Term
[image]
Definition
poisonous and infectious material causing immediate and serious toxic effects
Term
[image]
Definition
poisonous and infectious material causing other toxic effects
Term
[image]
Definition
biohazardous infectious material
Term
[image]
Definition
corrosive material
Term
[image]
Definition
dangerously reactive material
Term
Scientist credited with discovering the electron
Definition
J. J. Thomson
Term

This model of the atom is a sphere of positive fluid with negative electrons embedded in it (nicknamed the plum pudding model)

Definition
Thomsons model of the atom
Term
This scientist shot a stream of alpha particles at a thin gold foil and observed the deflection of the alpha particles.
Definition
Rutherford
Term
The three main features of Rutherford's model of the atom
Definition

1. A nucleus which contains all the positive charge, most of the mass, and is extremely small.

2. Electrons that orbit the nucleus.

3. Empty space - the vast majority of the atom is empty space.

Term
The nickname for the Rutherford model of the atom
Definition
the solar-system atomic model
Term
elements that differ in mass but are chemically alike (have the same number of protons and electrons)
Definition
isotopes
Term
Scientist who discovered the neutron
Definition
James Chadwick
Term
Scientist who added energy levels to Rutherford's model of the atom
Definition
Neils Bohr
Term
The term for the number of protons in the nucleus of an atom.
Definition
Atomic number
Term
The term for any subatomic particle residing in the nucleus.
Definition
Nucleon
Term
The term for the total number of protons and neutrons in the nucleus.
Definition
Mass number
Term
Way in which to calculate the number of neutrons in a nucleus.
Definition
mass number - atomic number
Term
Term for the horizontal rows on the periodic table
Definition
periods
Term
Vertical columns on the periodic table
Definition
Groups
Term

Family in column 1 on the periodic table

Definition
alkali metals
Term
Family in column 2 on the periodic table
Definition
alkaline earth metals
Term
Family in column 17 on the periodic table
Definition
halogens
Term
Family in column 18 on the periodic table
Definition
noble gasses
Term
Found to the left of the staircase line on the periodic table
Definition
metals
Term
Found to the right of the staircase line on the periodic table
Definition
non-metals
Term
Touching the staircase line on the periodic table
Definition
metalloids
Term
The only metal not a solid at room temperature
Definition
mercury
Term
good conductors of heat and electricity
Definition
metals
Term
poor conductors of heat and electricity
Definition
non-metals
Term
Term for the outermost occupied energy level of an atom
Definition
valence energy level
Term
Term for electrons in the outermost energy level of an atom
Definition
valence electrons
Term
The period number that an element is in represents
Definition
the number of occupied energy levels
Term
The group number (using the "A" system) represent
Definition
the number of electrons in the outermost energy level
Term
Form when an atom either gains or losses electrons
Definition
ions
Term
A diagram that shows the symbol of the element and the number of electrons (represented by dots) in the outermost shell
Definition
Lewis dot diagrams or electron dot diagrams
Term
Term for a positively charged atom
Definition
cation
Term
Term for a negatively charged atom
Definition
anion
Term
Negatively charged ions will ______ electrons
Definition
gain
Term
Positively charged atoms will _______ electrons
Definition
lose
Term
Non-metals tend to form these kinds of ions
Definition
negative (anions)
Term
Metals tend to form these kinds of ions
Definition
positive (cations)
Term

Ionic compounds are made up of

Definition
a metal and a non-metal
Term
Ionic compounds have these types of bonds
Definition
ionic bonds
Term
Ionic bonds involve electron _____
Definition
transfer (stealing)
Term
Molecular compounds are made up of
Definition
two non-metals
Term

Type of bond in molecular compounds

Definition
covalent bonds
Term
Covalent bonds involve electron _______
Definition
sharing
Term
The type of compound in which the charges MUST add up to zero
Definition
ionic compounds
Term
When found by themselves these elements always come in pairs (they are diatomic)
Definition

all of the "gens"

oxygen, nitrogen, hydrogen, and the halogens

Term
Type of compound that forms a crystal lattice
Definition
ionic compounds
Term
Type of compound that forms molecules
Definition
molecular compounds
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