Unit Three Review Periodicity Question Preview (ID: 42999)


Review Periodic Table Info. TEACHERS: click here for quick copy question ID numbers.

Atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined
a) charge
b) mass
c) outer edge
d) probabiltiy

The general trend in the radius of an atom moving down a group is partially accounted for by the
a) decrease in the mass of the nucleus.
b) fewer number of filled orbitals.
c) increase in the charge of the nucleus.
d) shielding of the outer electrons by inner electrons.

A(n) is an atom, or bonded group of atoms, that has a positive or negative charge.
a) halogen
b) ion
c) isotope
d) molecule

An atom becomes negatively charged by
a) gaining an electron.
b) gaining a proton.
c) losing an electron.
d) losing a proton.

Elements in the same group have the same
a) atomic radius.
b) energy level of outer electrons
c) nuclear charge.
d) number of valence electrons.

Most of the elements in groups 16 through 18 are classified as
a) alkali metals.
b) inner transition metals.
c) nonmetals
d) alkaline earth metals.

Identify the period and group of the element that has the electron configuration Ne3s2-3p3.
a) period 2, group 2
b) period 3, group 1
c) period 3, group 13
d) period 3, group 15

What is the trend in atomic radii as you move from left-to-right across a period?
a) generally decreases
b) generally increases
c) remains the same
d) varies randomly

How many electrons does an atom generally need in its outer level to be the most stable?
a) 4
b) 8
c) 10
d) 12

Which of the following electron configurations represents the most chemically stable atom?
a) He 2s2-2p3
b) Ne 3s2-3p5
c) Ne 3s2-3p6-4s2-3d5
d) Ne 3s2-3p6

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