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Write answers on sheet of paper – 13, 16, 17, 20
Choice1
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Choice 3
Choice 4
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What is the symbol for carbon?
C
Symbols are assigned to each of the elements.
Some are the first letters of the element, some are not.
The first letter is always capitalized,
the second is lower cased.
Row 1, Col 1
How many protons are in an atom of sodium?
11 protons
Protons are the same number as the atomic number.
The number of protons is equal
to the amount of electrons.
Protons are positive.
Electrons are negative.
1,2
How many neutrons are there in Hydrogen?
Zero Neutrons
Neutrons are in the nucleus with the protons.
Together they equal the majority of the mass.
1,3
How many electrons are in an atom of Cl?
17 Electrons
Electrons are negative.
They are the same number as protons.
Electrons have no mass and
circle the outside of the nucleus.
1,4
What is the formula for water?
H2O
A formula is a chemical compound.
It is made of 2 or more different elements
2,1
How many elements are in baking soda, NaHCO3?
Na -1
H- 1
C- 1
O- 3
The number, the subscript
indicates the ratio of atoms.
2,2
If protons are positive, neutrons are neutral, electrons are --?
Electrons are negative.
Electrons are attracted to the
protons which are positive.
Electrons “buzz” around the
nucleus at different levels.
2,3
If protons and neutrons are in the nucleus,
electrons are in the ------?
Electron Cloud
The electrons “buzzing”
around the nucleus
like a cloud.
Electrons have no definite path,
But stay a definite distance
from the nucleus
2,4
Where are the protons and neutrons in the atom?
Nucleus
The nucleus is where most
of the mass of an atom is.
It is located in the
middle of the atom.
3,1
What is a compound?
2 or more elements
chemically combined
A compound is different from an element
because it is 2 different elements combined.
An element is the same all the way through.
3,2
If the atomic number is 14, and the mass is 28,
the number of neutrons is -----?
14 Neutrons
Atomic mass:
28
Atomic number - 14
Neutrons
14
3,3
What are the electrons called in the outermost shell
called?
Valence Electrons
Electrons are arranged in energy levels.
The number of electrons in the outer level
indicates which group or family the
element belongs in. It also indicates what
other elements it might bond with.
3,4
What is an atom called that has more electrons?
Ion
Atoms can lose electrons to reach equilibrium.
Atoms can also lose neutrons,
but never protons.
4,1
What is an atom called that has more neutrons?
Isotope
An isotope is an atom that loses neutrons.
4,2
What do the rows on the periodic table represent?
Periods
Periods are horizontal
and represents the number
of energy levels of the
elements in that row.
4,3
What do the columns on the periodic table represent?
Groups or Families On the Periodic Table Groups are vertical and
represent the number of
valence electrons in the outer
energy levels. The elements
in that column have the same
physical properties –
like a family.
4,4
How many electrons are in each energy level?
2, 8, 8, 18, 32
Electrons have a definite number
in each energy level.
5,1
What is the element tile for Carbon?
6
C
12
Atomic number
Atomic symbol
Atomic mass
5,2
What is the rule when atoms form bonds with other
atoms so their outer shell is stable?
Must have 8 electrons
to be stable.
5,3
What order are the properties in on the Periodic Table?
Metals, Metalloids, Nonmetals
Left
Staircase
Right
Based on their physical propeties
Metals/Nonmetals – opposites
Metalloids –take on characteristics of both
5,4