A neutral atom must have the same number of _______ and _______.
Atomic Radius

Quiz
•
Chemistry
•
9th - 12th Grade
•
Medium
Jon Geiger
Used 9+ times
FREE Resource
26 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
protons
neutrons
electrons
Answer explanation
The net charge of an atom is # protons - # electrons. When protons = electrons, the net charge is zero.
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
What is the charge of an atom's nucleus?
positive
negative
neutral
none of these
Answer explanation
The nucleus has protons (+) and neutrons (0), so they add to be positive!
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What law describes the force relationship between protons in the nucleus and the electrons orbiting around the nucleus?
Ideal Gas Law
Combined Gas Law
Coulomb's Law
Biot-Savart Law
Answer explanation
Coulomb's Law states that the force between two charged particles is proportional to both of their charges, and inversely proportional to the distance between them.
4.
DROPDOWN QUESTION
1 min • 1 pt
Coulombic Attraction is the (a) between two (b) charges, often used to describe the interaction between (c) in an atom.
Answer explanation
Like charges repel, and opposite charges attract! Coulombic attraction refers to the latter.
5.
DROPDOWN QUESTION
1 min • 1 pt
Adding a proton to an atom (a) coulombic attraction between protons and electrons, which causes the electrons to be (b)
6.
DROPDOWN QUESTION
1 min • 1 pt
Increasing the number of protons in an atom within a row (a) the atomic number and (b) the radius of the atom.
Answer explanation
Adding more protons causes coulombic attraction to increase and pulls the electrons closer, decreasing the radius of the atom.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
Answer explanation
Electrons are stored in shells or energy levels! Entering a new period requires a new shell to be added, drastically increasing the atomic radius.
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