Download SCIENCE: EIGHTH GRADE CRT FIRST QUARTER

Third Quarter - End of Quarter Exam
Study Guide
Physical Science
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Question
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How are electrons in an atom organized?
Which subatomic particles in an atom have a negative charge?
Which subatomic particles in an atom have a positive charge?
Which subatomic particles in an atom have no charge?
Which subatomic particles are found in the nucleus of an atom?
Where are electrons located in an atom?
Who was the Greek philosopher responsible for naming the atom?
What are the particles that make up an atom?
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Who proposed that all atoms are small, hard particles made of a single material formed
into different shapes and sizes?
Which two subatomic particles have the greatest mass?
An element that is a very reactive gas is most likely a member of which group or period
on the periodic table?
Using the periodic table; how is the number of electrons in an atom determined?
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Using the periodic table; how is the number of protons in an atom determined?
Which group of elements do not normally form chemical bonds?
Based on the number of valence electrons, which of the following elements is the most
reactive: Li, Be, B, Ne?
How many electrons does a nitrogen (N) atom contain?
How many protons does an argon (Ar) atom contain?
How many neutrons does the most commonly occurring form of a potassium (K) atom
contain?
What are atoms of the same element with different numbers of neutrons called?
Two isotopes of carbon are carbon-12 and carbon-14. How do these isotopes differ?
Given a diagram of an element from the periodic table, find atomic mass.
On the periodic table, what is a column of elements called?
How many elements are in the first period of the periodic table?
On the periodic table, what is a row of elements is called?
What are Groups 3–12 on the periodic table called?
Determine an element based using the period and the group number.
What is the name of group 13 on the periodic table?
What is the name of group 18 on the periodic table?
An atom’s identity is determined by which subatomic particle?
In what period is calcium (Ca) located?
Find the number of protons given the group number and period.
Which of the following elements are halogens:
What is the name of group 16 on the periodic table?
Locate elements by period number.
How many electrons can the second energy level closest to the nucleus hold?
What is the smallest particle of an element called that has the chemical properties of that
element?
What type of charge do atoms have?
What subatomic particle does the atomic number of an atom represent?
Answer
In energy levels
electrons
protons
neutrons
Proton & neutron
Electron cloud
Democritus
Protons, neutrons,
electrons
Dalton
Proton and neutron
halogen
Atomic number
Atomic number
Noble gases
Li
7
18
20
isotopes
By two neutrons
The atomic mass is the
bottom number
Group or family
2
period
Transition metals
Boron group
Nobel gases
proton
4
Fluorine and chlorine
Oxygen group
eight
atom
neutral
protons
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What two subatomic particles are used to determine mass number?
What must the number of electrons equal in an atom?
What items are contained in the nucleus of an atom?
What is the smallest subatomic particle of an atom?
How many electrons can the first energy level of an atom hold?
What type of charge does a proton have?
What type of charge does a neutron have?
What are the three main subatomic particles of an atom?
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Given a Bohr diagram of an atom determine the atomic number.
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Describe the amount of electrons in the outer energy level of a noble gas?
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Why do elements in a family or group in the periodic table often share similar
properties?
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What element is a gas at room temperature, and has six electrons in its outer level?
Which of the following groups have a complete set of valance electrons in their outer
energy level?
How many valance electrons do atoms of elements in the same group as oxygen have in
their outer level?
Which element has a full outermost energy level containing only two electrons?
How many valence electrons does nitrogen have?
Oxygen (O) is in Group 16. How many valence electrons does oxygen have?
Sodium (Na) is in Group 1. How many valence electrons does sodium have?
Carbon (C) is in Group 14. How many valence electrons does carbon have?
Potassium (K) is in Group 1. How many valence electrons does potassium have?
Chlorine (Cl) is in Group 17. How many valence electrons does chlorine have?
Where are valence electrons located within an atom?
Given the classes metals, metalloids, gases and nonmetals, what class contains the most
elements on the periodic table?
Where are metalloids located on a periodic table?
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Which element is a metal on the periodic table:
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Which element is a nonmetal on the periodic table:
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Which element is a metalloid on the periodic table:
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Which class of elements has no luster, and is a poor conductor?
Which elements are strong conductors of electricity?
What elements have some properties of metals and nonmetals?
What are elements in group 18 called?
Where are the most active metals located on the periodic table?
Which elements are transition metals?
What nonmetal can exist as diamond, graphite, and charcoal?
What nonmetal is located in group 1 of the periodic table?
Which pair of atoms can form an ionic bond?
What subatomic particle is the most important in determining how an atom will bond?
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What type of bond occurs between oppositely charged ions?
What type of bond occurs when the force of attraction is between the nuclei of atoms and
the electrons shared by the atoms?
What type of bond holds together a neutral group of atoms?
Protons and neutrons
protons
Protons and neutrons
electrons
2
positive
neutron
Protons, neutrons,
electrons
Count the positive
charges in the nucleus
A complete set of
electrons
Their atoms have the
same number of
electrons in their outer
energy level.
oxygen
Nobel gases
6
helium
5
6
1
4
1
7
Outer energy level
metals
Between the metals and
nonmetals
Metals are left of the
zigzag line.
Nonmetals are right of
the zigzag line.
Metalloids border
(touch) the zigzag line.
nonmetals
metals
metalloids
Nobel gases
Lower left
Groups 3-12
carbon
hydrogen
Potassium and fluorine
Electrons in the
outermost energy level
Ionic bond
Covalent bond
Covalent
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Determine the correct electron-dot diagram for various elements.
What is the charge of a potassium ion that has 19 protons and 18 electrons?
What is the correct formula for sodium chloride?
What is the correct formula for calcium fluoride?
What is the charge of an ion that contains 16 protons and 18 electrons?
What do atoms gain, lose or share when they bond?
Why don’t noble gases normally form chemical bonds?
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What is the charge of an aluminum ion that has 13 protons and 10 electrons?
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Lithium 7 (Li) has what mass number?
The family of “salt-producing” elements is known as what?
An atom which has more neutrons than protons is called what?
What is a nonmetal halogen family with an atomic mass of 35?
An atom which loses an electron changes it’s name to what?
What is the molecular mass of Carbon Dioxide (CO2)?
What is the octet rule, where atoms want to become stable?
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How many different elements are in the compound sodium carbonate? (Na2CO3)
How many atoms are in the compound sodium carbonate? (Na2CO3)
Which energy level contains electrons with the least amount of energy?
PO5 is the chemical formula for what compound?
CO is the chemical formula for what compound?
Nitrogen Tribromide is compound formed through what type of bond?
The number of electrons an atom gains or loses with it’s corresponding charge when
bonding is called what?
1+
NaCl
CaF2
2electrons
Have a full outermost
energy level
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10
Halogens
Isotope
Chlorine
Cation
44
Atoms want 8 valence
electrons
3
6
K
Phosphorous pentoxide
Carbon monoxide
Covalent
Oxidation Number