WorksheetsAtomic structure and electron configurations
Total questions: 18
Worksheet time: 13mins
Name
Class
Date
1.
Which of these is the largest planet in the Solar System?
a)
Earth
b)
Mars
c)
Mercury
d)
Jupiter
e)
Pluto
2.
How many neutrons does an atom of U-238 have?
a)
92
b)
146
c)
238
d)
3
3.
Chlorine has an atomic number of 17 and a mass number of 35. It has _________.
a)
17 protons, 17 electrons, and 18 neutrons.
b)
17 protons, 17 electrons, and 52 neutrons.
c)
35 protons, 35 electrons, and 17 neutrons.
d)
18 protons, 18 electrons, and 17 neutrons.
4.
An atom of Neon has ____electrons.
a)
20
b)
5
c)
10
d)
12
5.
An atom that has 54 protons, 54 electrons, and 78 neutrons has an isotope notation of _________.
a)
5478Xe
b)
55231Cs
c)
54132Xe
d)
7854Pt
6.
An isotope that has 20 protons, 20 electrons, and 23 neutrons has an isotopic notation of:
a)
4320Ca
b)
4322Ca
c)
4323Ca
d)
4324Ca
7.
Which of the following atoms has the highest ionization energy?
a)
Si
b)
As
c)
Al
d)
P
8.
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5?
a)
Cl
b)
I
c)
Se
d)
Br
9.
The electrons available to be lost, gained, or shared when atoms form molecules are called _________.
a)
electron clouds
b)
valence electrons
c)
ions
d)
p electrons
10.
Valence electrons are ____ electrons
a)
inner
b)
square
c)
outer
d)
triangular
11.
In ANY isotope or atom, the number of protons and electrons are always
a)
equal
b)
20 fewer
c)
20 more
d)
added up to be 8
12.
An atom is electrically neutral because _________.
a)
the numbers of protons and electrons are equal
b)
neutrons balance the protons and electrons
c)
the numbers of protons and neutrons are equal
d)
nuclear forces stabilize the charges
13.
How many protons, electrons, and neutrons, respectively, does 11950Sn have?
a)
50, 50, 119
b)
50, 50, 69
c)
69, 50, 119
d)
50, 69, 50
14.
Which of the following has the smallest atomic radius?
a)
N
b)
S
c)
Cl
d)
F
15.
Which of the following is ranked in order of largest to smallest atomic radius?
a)
Cr > Cs > F > S > Ge
b)
F > S > Ge > Cr > Cs
c)
Cs > Cr > Ge > S > F
d)
Cs > Ge > Cr > F > S
16.
Which of the following has the lowest ionization energy?
a)
Fr
b)
Ba
c)
Y
d)
Ti
17.
The element that has the greatest electronegativity is _________.
a)
O
b)
Zn
c)
Na
d)
F
18.
Which element has the electron configuration [Ar] 4s2 3d10 ?
a)
Ca
b)
Ni
c)
Ga
d)
Zn
100 %
