Atoms

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Atoms
Periodic Table
Trends in The PT
Compounds
Mixtures
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Define atom.
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Atom can be defined 3 ways1. the simplest
unit of an element that still has the properties
of the element2. un-cuttable and indivisible3.
the building blocks of all matter.
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What are the names, locations and charges of the
3 subatomic particles?
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Name Charge Location
Proton Nucleus
Neutron No charge Nucleus
Electron - Outside nucleus in shells or cloud
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What element has 10 protons in its nucleus?
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Neon
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How many protons, neutrons and electrons does
Carbon-12 have?
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An atom of Carbon-12 would have 6 protons, 6
electrons and 6 neutrons.
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Draw a Bohr model for a neutral atom of Calcium.
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(No Transcript)
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Elements in the same column of the periodic table
are in the same ________. Elements in the same
row of the periodic table are in the same
________.
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Elements in the same column of the periodic table
are in the same group. Elements in the same row
of the periodic table are in the same period.
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Locate the metals, nonmetals and metalloids on a
periodic table.
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The metals are located to the left of the
staircase. The nonmetals are located to the
right of the staircase. The metalloids (B, Si,
Ge, As, Sb, Te) are located right on the
staircase.
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What are characteristics of metals, nonmetals and
metalloids? Name at least 4 for each.
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Metals most metals are malleable, ductile, good
conductors of heat and electricity, shiny, react
with oxygen and acids.Nonmetals brittle, not
good conductors of heat or electricity, gases at
room temperature, and are dull with no
luster.Metalloids can be shiny or dull, can
be a little ductile or malleable, and are
somewhat ok conductors.
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Why do elements in the same group (family) behave
the same way?
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Elements in the same group have the same number
of valence electrons. This makes them behave the
same way.
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This metal is the most reactive in its period.
It has 55 protons in its nucleus.
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Cesium
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True/Falsecorrect the statement if
false.Elements on the Periodic Table are
arranged in order of increasing density.
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False, elements on the Periodic Table are
arranged in order of increasing atomic number.
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Which group of elements in the Periodic Table is
unreactive and why?
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The noble gases b/c they have a full outer shell
of electrons
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Which group of metals is the most reactive?
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The Alkali metals
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Which group of nonmetals is most reactive?
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The Halogens
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As you move across a period on the Periodic
table, the number of energy shells (levels)
_________.A. IncreasesB. DecreasesC. Stays
the same
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C. Stays the same
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What is the difference between an element and a
compound?
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Elements and compounds are both pure substances.
A compound is made up of two or more different
elements that are chemically combined to create a
new substance.
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A compound has a _____________ ratio of
components.
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A compound has a definite (or fixed) ratio of
components.
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In the picture below, how many different
compounds are there? How many different
elements? How many total molecules? How many
total atoms?
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Different Compounds 2Different Elements
2Total Molecules 10Total Atoms 21 18 39
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Write a chemical formula for each of the
compounds in the picture below. Use the format
of BW for your formulas.
A
B
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A BW2B B4W2
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How is a compound formed? How is it separated?
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A compound is formed through a chemical reaction.
It is separated by a chemical reaction as well.

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If you dissolve salt into water, which is the
solute and which is the solvent?
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The salt would be the solute, the water would be
the solvent.
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True or False. Correct if false. Creating a
solution is an example of a chemical change.
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False. Creating a solution is an example of a
physical change. It is easily undone, the
properties do not change etc.
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True or False. Correct if false. Gases cannot
be dissolved into liquids.
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False. Gases can be dissolved into liquids.
Ever drink a bottle of soda???
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Which of the below pictures show a picture of a
mixture?
A or B
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Picture A shows a picture of a mixture. You can
tell because there are different compounds
floating around. Picture B has all the same type
of dots (elements) in it.
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A solution that contains a large amount of solute
is best described as _________.A. DiluteB.
WeakC. Concentrated
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C. Concentrated