WorksheetsAtoms, Ions and Periodic Table Trends
Total questions: 44
Worksheet time: 44mins
As you move down a group, atomic radius increases because
you add more and more neutrons.
you add more and more protons.
you add more and more shells (energy levels).
you add more atomic mass.
Which element in Period 6 has the lowest ionization energy?
Rn
Cs
Os
Tm
As you move across the periodic table from left to right, the atomic radius decreases. Why?
The number of protons increases, so attraction to electrons increases.
The number of energy levels increases.
The number of electrons increases.
The atomic mass increases.
Francium (Fr) has the lowest ionization energy in Group 1 because
it has the smallest number of valence electrons.
it has the greatest atomic mass.
it has the greatest number of protons, so it attracts its electrons the strongest.
its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.
Which atom in Period 4 has the largest atomic radius?
K
Kr
Fe
Fe
The element with the largest electronegativity in the halogen group is
At.
F.
Cl.
Br.
Ions are formed when atoms gain or lose ___.
electrons
protons
neutrons
atomic mass
What periodic trend is illustrated here?
Atomic Radius
Ionization Energy
When an atom loses an electron, it becomes a(n) _____________ ion.
positive
negative
neutral
polyatomic
What is the charge of an atom that has gained two electrons?
-1
-2
+1
+2
Which group on the periodic table is known as the alkaline earth metals?
group 1A
group 2A
group 8A
group 7A
Atoms of elements in group 1 have ____________.
one electron in their outermost energy level
two electrons in their outermost energy level
seven electrons in their outermost energy level
eight electrons in their outermost energy level
Which of the following elements is most likely to form a negatively-charged ion?
I
Br
Cl
F
Which of the following is an ion?
O2-
C
HCl
Lithium-3
Where would you expect to find the smallest atoms?
upper left
upper right
lower left
lower right lower right
Sodium (Na) and Cesium (Cs) are in the same group on the periodic table. Based on their locations, which statement about sodium and Cesium is true?
Sodium is less electronegative than cesium.
Sodium has fewer energy levels than cesium.
Sodium has a larger ionic radius than cesium.
Sodium has lower ionization energy than cesium.
Which of the following will have a lower ionization energy than Scandium (Sc)?
Helium (He)
Silicon (Si)
Calcium (Ca)
Magnesium (Mg)
Vertical columns of elements are known as ________________- Elements in a column have the same number of ______________ .
groups, valence electrons
periods, neutrons
groups, protons
gangs, members
Which element is located in period 4?
Zirconium (Zr)
Silicon (Si)
Beryllium (Be)
Iron (Fe)
Which is a halogen?
Helium
Chlorine
Oxygen
Neptune
Group II on the Periodic Table contains the _____________________________. They form ions with a charge of _________________.
alkali metals, -2
alkaline earth metals, +2
halogens, -1
noble gases, 0
A Group IIIA element has ____ electron(s) in it's outermost level and when it forms an ion it _________________________.
1, loses 1 electron
3, loses 1 electron
3, loses 3 electrons
3, gains 3 electrons
A positively charged particle found in the nucleus of an atom is
a quark.
an electron.
a proton.
a neutron.
A negatively charged particle located outside the atom's nucleus is
a neutron.
a proton.
an electron.
a quark.
A subatomic particle that has no charge and that is found in the nucleus of an atom is
a quark.
a proton.
a neutron.
an electron.
The center of an atom is
a neutron.
a nucleus.
a quark.
a bohr.
Why is the overall charge of an atom neutral (0)?
They have the same number of protons and neutrons.
They have the same number of protons and electrons.
They have the same number of electrons and neutrons.
How many electrons does this oxygen atom have?
16
8
24
6
How many electrons can be in the 2nd energy level hold?
1
2
4
8
How many electrons does the first shell hold?
1
2
4
8
What on a periodic table tells you the number of protons in an atom?
Atom number
Atomic number
Proton number
Mass number
What is the atomic mass of Potassium?
8
19
39
39.0983
How many Protons are in Magnesium?
24.305
24
12
6
What is the number of neutrons in Potassium?
8
19
39
20
