WorksheetsCh 5 - 20 Q Radius
Total questions: 20
Worksheet time: 11mins
Within a group, what happens to the size of the atoms as you go down?
Atomic radius gets smaller
Atomic radius gets larger
Atomic radius cannot be predicted this way
Within a period, generally what happens to the size of the atoms as you go across from left to right?
Atomic radius gets smaller
Atomic radius gets larger
Atomic radius cannot be predicted this way
Both of these elements are in Group 2. Which one has a larger radius?
Be
Ba
Atomic radius cannot be predicted this way
Both of these elements are in Group 1. Why are Rb atoms larger than Na atoms?
Because Rb atoms have electrons in the 5th energy level (5s1) and Na ends with the 3rd energy level (3s1).
Because Rb atoms have 26 more protons than Na atoms.
Because a Rb atom has more mass than a Na atom.
Because a Rb atom has more neutrons than a Na atom.
Both of these elements are in Group 16. Which one has a larger radius?
S
Po
Atomic radius cannot be predicted this way
Both of these elements are in the 3rd period. Which one has a larger radius?
Mg
S
Atomic radius cannot be predicted this way
Both of these elements are in Period 2. Why is Li larger than C?
Because C atoms have more electrons than Li atoms.
Because C atoms have more protons than Li atoms and they pull all the electrons closer to the nucleus.
Because a Li atom has less mass than a C atom.
Because a C atom has more neutrons than a Li atom.
Both of these elements are in the 6th period. Which one has a larger radius?
Cs
Po
Atomic radius cannot be predicted this way
How does an atom become a positive ion?
By gaining one or more electrons
By losing one or more electrons
By gaining one or more protons
By losing one or more protons
How does an atom become a negative ion?
By gaining one or more electrons
By losing one or more electrons
By gaining one or more protons
By losing one or more protons
Which elements tend to lose electrons when reacting with other elements?
Metals
Nonmetals
Metalloids
Which elements tend to gain or share electrons when reacting with other elements?
Metals
Nonmetals
Metalloids
Which statement about atoms and positive ions is a true statement?
A positive ion of an element is always smaller than the original atom of that element.
A positive ion of an element is always larger than the original atom of that element.
A positive ion of an element is sometimes larger than the original atom of that element.
A positive ion of an element is sometimes smaller than the original atom of that element.
Which statement about atoms and negative ions is a true statement?
A negative ion of an element is always smaller than the original atom of that element.
A negative ion of an element is always larger than the original atom of that element.
A negative ion of an element is sometimes larger than the original atom of that element.
A negative ion of an element is sometimes smaller than the original atom of that element.
Which is bigger?
A neutral aluminum (Al) atom is bigger than an aluminum (Al+3) ion.
An aluminum (Al+3) ion is bigger than a neutral aluminum (Al) atom.
There is no way to know which is bigger, the atom or the ion.
When an atom goes from neutral to being a positive ion, it gets smaller. Why is that true? (Choose the TWO reasons)
Often an energy level is emptied so it is like taking off an entire layer.
Because one or more electrons were removed there are more protons than electrons so the protons can pull all the electrons closer.
Protons were added to the nucleus so they now pull all the electrons closer.
Neutrons were added to the nucleus which increases the strength of the nucleus so it now pulls all the electrons closer.
Which is bigger?
A neutral strontium (Sr) atom is bigger than a strontium (Sr+2) ion.
A strontium (Sr+2) ion is bigger than a neutral strontium (Sr) atom.
There is no way to know which is bigger, the atom or the ion.
Which is bigger?
A neutral nitrogen atom is bigger than a nitride (N-3) ion.
A nitride (N-3) ion is bigger than a neutral nitrogen atom.
There is no way to know which is bigger, the atom or the ion.
When an atom goes from neutral to being a negative ion, it gets bigger. Why is that true? (Choose the TWO reasons)
Having more electrons means they repel each other more which makes the radius larger.
Because one or more electrons were added there are now less protons than electrons so the protons can't pull all the electrons quite as strongly.
Protons were removed from the nucleus so the protons can't pull all the electrons quite as strongly.
Neutrons were added to the nucleus which decreases the strength of the nucleus so it now can't pull all the electrons quite as strongly.
Which is bigger?
A neutral bromine atom is bigger than a bromide (Br-1) ion.
A bromide (Br-1) ion is bigger than a neutral bromine atom.
There is no way to know which is bigger, the atom or the ion.
