Font size
WorksheetsUnit 3 Midterm 1 Practice
Total questions: 33
Worksheet time: 33mins
1. The ______the atomic radius, the ________the attraction, the _______the ionisation energy.
smaller, stonger, higher
bigger, weaker, higher
Across a period, Ionization energy ____a____
Down a group, ionisation energy ____b_____
a : increase
b: decrease
a : increase
b: increase
a : decrease
b: decrease
Which element has the greatest ionization energy: Aluminum (Al) or Chlorine (Cl)?
Aluminum (Al)
Chlorine (Cl)
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
When moving left to right across a period, the atomic size decreases. This means the first IE ___________.
increases
decreases
remains constant
i am not sure
Which of the following factors will affect ionization energy:
Atomic radius
Effective nuclear charge
Shielding effect
All of the above
Why does an atom's radius increase when entering a new period (row)?
Examples: He -> Li, Ne -> Na, Ar -> K
A new electron shell is formed
More protons are added to the atom
More neutrons are added to the atom
The increased number of electrons increases repulsion forces
Select two!
The trend for atomic radius is that it:
Increases across a period
Decreases across a period
Increases down a group
Decreases down a group
Which order is correct from largest to smallest atomic radius?
Thallium, Indium, Gallium, Boron
Boron, Thallium, Indium, Gallium
Boron, Gallium, Indium, Thallium
Thallium, Gallium, Indium, Boron
Elements in the same group have : (2 correct answers)
Similar chemical properties
Similar names
Same number of outer (valence) electrons)
The same number of protons
The blue elements (left side) are called
The yellow elements (right side) are called
Match the following elements to the group they belong to.
sodium
alkali metal
calcium
alkaline earth metal
chlorine
halogen
argon
noble gas
lithium
2 energy levels
helium
1 energy level
aluminum
3 energy levels
bromine
4 energy levels
strontium
5 energy levels
According to the Octet Rule, how many electrons does an atom want in it's valence shell?
1
6
8
10
In an Ionic Bond Valence Electrons are what?
created
destroyed
gained or lost
shared
gain electrons
anions
lose electrons
cations
cations are
positively charged
anions are
negatively charged
atoms are
neutral
What is the atomic radius?
The distance from the nucleus to the outer boundary of an atom
The distance from one side of an atom to the other side
The distance around the atom
The distance between atoms in the gas phase
The distance between atoms in the solid phase
How many valence electrons are found in atoms of group 1?
7
6
4
1
USE THE PERIODIC TABLE
How many valence electrons does Phosphorus have?
31
5
15
4
Same number of valence electrons
Groups
Same number of energy levels (electron shells)
Periods
Outter most electrons
Valence
Cations become (a) then the original neutral atom (parent atom). Anions become (b) then the original neutral atom (parent atom).
How are atomic radius and ionization energy related?
They are both the same thing
As ionization energy increases, atomic radius decreases
As ionization energy increases, atomic radius increases
They are not related
Elements will low ionization energy become (a) and elements with high ionization energy before (b) .
When K and F bond together to form a compound how many electrons does K transfer to F?
0
1
2
3
What is the correct Lewis Dot Structure for ammonia NH3
Which is the correct molecular structure for carbon dioxide CO2?
