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Unit Three Review Periodicity
Test Description: Review Periodic Table Info
Instructions: Answer all questions to get your test result.
1) Atomic radii cannot be measured directly because the electron cloud surrounding the nucleus does not have a clearly defined
A
mass
B
charge
C
probabiltiy
D
outer edge
2) The general trend in the radius of an atom moving down a group is partially accounted for by the
A
fewer number of filled orbitals.
B
decrease in the mass of the nucleus.
C
increase in the charge of the nucleus.
D
shielding of the outer electrons by inner electrons.
3) A(n) is an atom, or bonded group of atoms, that has a positive or negative charge.
A
ion
B
halogen
C
molecule
D
isotope
4) An atom becomes negatively charged by
A
losing a proton.
B
losing an electron.
C
gaining an electron.
D
gaining a proton.
5) Elements in the same group have the same
A
number of valence electrons.
B
nuclear charge.
C
energy level of outer electrons
D
atomic radius.
6) Most of the elements in groups 16 through 18 are classified as
A
inner transition metals.
B
nonmetals
C
alkaline earth metals.
D
alkali metals.
7) Identify the period and group of the element that has the electron configuration Ne3s2-3p3.
A
period 2, group 2
B
period 3, group 13
C
period 3, group 15
D
period 3, group 1
8) What is the trend in atomic radii as you move from left-to-right across a period?
A
generally decreases
B
remains the same
C
varies randomly
D
generally increases
9) How many electrons does an atom generally need in its outer level to be the most stable?
A
4
B
10
C
12
D
8
10) Which of the following electron configurations represents the most chemically stable atom?
A
Ne 3s2-3p5
B
Ne 3s2-3p6-4s2-3d5
C
Ne 3s2-3p6
D
He 2s2-2p3
*select an answer for all questions
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