Ch 3, 8th Grade Question Preview (ID: 60275)


Atoms And Bonding. TEACHERS: click here for quick copy question ID numbers.

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

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

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)

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)

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

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

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

The elements on the left side of the perioduc table are mostly
a) metals
b) nonmetals
c) metalloids
d) noble gases

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

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

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.

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

An atom contains ___ in its nucleus.
a) protons
b) electrons
c) neutrons
d) protons and neutrons

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