Ch 3, 8th Grade Question Preview (ID: 60275)
Atoms And Bonding.
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An atom contains ___ in its nucleus.
a) protons
b) electrons
c) neutrons
d) protons and neutrons
If an atom loses 2 electrons, its charge becomes
a) +2
b) -2
c) -1
d) +1
The particle with the largest mass is
a) protons and neutrons are equally massive
b) protons
c) neutrons
d) electrons
What do you know about an atom if it has an atomic number of 6?
a) It has 6 protons in its nucleus.
b) It has 6 valence electrons.
c) It is in Group 6.
d) It has 6 electrons total.
How many valence electrons does an atom need to be stable?
a) 8, or 2 if its hydrogen and helium
b) 6, or 2 if its hydrogen and helium
c) 2
d) 4, or 2 if its hydrogen and helium
The rows on the periodic table are also called
a) periods
b) groups
c) rows
d) columns
An element in Group 15 has how many valence electrons?
a) 5
b) 1
c) 15
d) 6
The elements on the left side of the perioduc table are mostly
a) metals
b) nonmetals
c) metalloids
d) noble gases
Nonmetals tend to ___ electrons to become stable.
a) gain
b) lose
c) neither lose nor gain
d)
The attraction between two oppositely charged ions is called a(n)
a) ionic bond
b) covalent bond
c) metallic bond
d) James Bond
To name an ionic compound, which name comes last?
a) the negative ion
b) the positive ion
c) the one with the most atoms
d) the one with the least atoms
Ionic compounds have
a) ionic crystals
b) high melting points
c) electrical conductivity
d) all of the above
Ionic bonds usually form when
a) a metal combines with a nonmetal
b) a metal combines with a metal
c) 2 nonmetals combine
d) a metal combines with air
In a triple bond, how many pairs of electrons are shared?
a) 3
b) 2
c) 1
d) 5
T/F: Molecular compounds (formed from covalent bonds) have low boiling points.
a) true
b) false
c)
d)
If electrons are shared equally, a ___ bond is formed
a) nonpolar
b) polar
c) ionic
d) metallic
Polar molecules are connected to each other by weak attractions called
a) van der Waals forces
b) the Force
c) metallic bonds
d)
Polished metals have a metallic luster, which means that
a) they are shiny and reflective
b) they conduct electricity well
c) they conduct heat well
d) they can be hammered into thin sheets
A mixture made of two or more elements, at least one of which is a metal.
a) alloy
b) compound
c) mixture
d) crystal
Alloys are generally ___ and ___ than the pure metals they're made of.
a) stronger and less reactive
b) weaker and less reactive
c) stronger and more reactive
d) weaker and more reactive
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