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7th Grade Chemistry Ch 3.1, 3.2, 3.3, 3.4,
Class review questions before quiz
35
Science
7th Grade
10/08/2014

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Term
What is found in the nucleus of an atom?
a. protons, electrons, neutrons
b. protons, electrons
c. protons, neutrons
d. neutrons, electrons
Definition
c. protons, neutrons
Term
Protons have ____ charges, Electons have _____ charges, Neutrons have ____ charges.
a. positive, no, negative
b. negative, no, positive
c. positive, negative, no
d. no, positive, negative
Definition
c. positive, negative, no
Term
Most of the atom's mass is found...
a. in the electrons and proteons
b. in the protons and neutrons
c. in the electrons and neutrons
d. in the protons
Definition
b. in the protons and neutrons
Term
The present day periodic table is arranged by _______
a. atomic number
b. atomic mass
c. alphabetical order
d. date of discovery
Definition
a. atomic number
Term
The number of protons and neutrons are always equal in an atom.
a. true b. false
Definition
b. false
isotopes!
Term
The atomic number identifies the number of _____ in the atom
a. electrons and neutrons
b. neutrons and proteons
c. protons and electrons
Definition
c. protons and electrons
Term
An isotope can be determined by looking at an atom's ____
a. atomic number
b. neutrons, electrons
c. protons, electrons
d. protons, neutrons
Definition
d. protons and neutrons
Term
The present day periodic table is still arranged in the same element order that Dmitri Mendeleev placed them in many years ago.
a. true b. false
Definition
b. false he did it by atomic mass today it is by atomic number - number of protons in nucleus
Term
Elements on the periodic chart contain all but one of the following
a. atomic number
b. atomic mass
c. year of its discovery
d. chemcial symbol
e. name of the element
f. If it is a metal, metalloid or nonmetal
Definition
c. Year of its discovery
Term
Another name for rows on the periodic table is
a. columns
b. familys
c. periods
d. groups
Definition
c. periods
Term
There are 18 periods and 7 groups on the periodic table
a. true
b. false
Definition
b. false
18 groups
7 periods
Term
Metalloids are found primarily on the left side of the periodic table.
a. true
b. false
Definition
b. false - near right side
Term
Elements in the same group have similar characteristics.
a. true
b. false
Definition
a. true
Term
The majority of the elements on the periodic table are Nonmetals
a. true
b. false
Definition
b. false - metals
Term
Malleable means a metal can be made into long wires.
a. true
b. false
Definition
b. false - hammared or rolled out
Term
Copper is a ductile metal.
a. true
b. false
Definition
a. true - can be made into long wires
Term
Metals usually react by _____ electrons.
a. gaining
b. losing
Definition
b. losing
Term
Group 2 is known as the ______
a. alkali metals
b. lanthanides
c. alkaline earth metals
d. actinides
e. transition metals
Definition
c. alkaline earth metals
Term
On the periodic table, what group is the most reactive?
a. 1
b. 2
c. 13
d. none of these
Definition
a. 1
Term
The last row of elements placed below the main part of the periodic table is known as the _______
a. actinide
b. lanthanide
c. transuranium
d. transition
Definition
a. actinide
Term
Hydrogen is a metal because it is found on the left side of the periodic table.
a. true
b. false
Definition
b. false
Term
Nonmetals usually lose electrons when they react with other atoms.
a. true
b. false
Definition
b. false - gain
Term
Nonmetals are poor conductors of electric current
a. true
b. false
Definition
a. true
Term
Nobel gases are found in _____
a. Row 7
b. Group 17
c. Group 18
d. Group 1
Definition
c. Group 18
Term
Carbon is a ______
a. metal
b. nonmetal
c. metalloid
d. none of these
Definition
b. Nonmetal
Term
Halogens are _____
a. very reactive
b. not very reactive
Definition
a. very reactive
Term
Halogens are less reactive than the noble gases
a. true
b. false
Definition
b. false
Term
Metalloids are liquids
a. true
b. false
Definition
b. false
Term
The alkali metals are never found uncombined with other elements
a. true
b. false
Definition
a. true
Term
Terbium (65) is a transuranium metal.
a. true
b. false
Definition
b. false
Term
The atomic number of carbon is 6. If its atomic mass was 14, it would be an isotope.
a. true
b. false
Definition
a. true
Term
Electrons have a greater mass than neutrons.
a. true
b. false
Definition
a. false
Term
Lanthanide metals are found in row 8 on the periodic table
a. true
b. false
Definition
b. false
row 6
Term
Noble gases are highly reactive
a. true
b. false
Definition
b. false - non reactive
Term
Reactivity and corrosiion are chemical properties
a. true
b. false
Definition
a. true
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