Atomic Structure and Charge Relationships

The video tutorial explains how to determine the charge of an atom by calculating the number of protons, neutrons, and electrons. It provides examples using different elements like carbon, sodium, fluorine, sulfur, calcium, and cesium, illustrating how to balance charges in neutral atoms and ions. The tutorial emphasizes the importance of atomic number and mass number in these calculations.

What is the atomic number indicative of in an atom?

• The number of neutrons

• The atomic mass

• The number of protons

• The number of electrons

What is the charge of a neutron?

• Positive one

• Negative one

• Zero

• Positive two

In a neutral atom, how do the number of protons and electrons compare?

• Protons are double the electrons

• Electrons are double the protons

• Protons are half the electrons

• They are equal

In a neutral carbon atom, how many electrons are present if there are six protons?

• Eight

• Ten

• Four

• Six

For a neutral sodium atom, what is the relationship between protons and electrons?

• Protons are less than electrons

• Protons are more than electrons

• Electrons are more than protons

• They are equal

What is the mass number of sodium if it has 11 protons and 12 neutrons?

• 12

• 11

• 23

• 24

How does a negative charge affect the number of electrons in an atom?

• It decreases the number of protons

• It has no effect

• It increases the number of electrons

• It decreases the number of electrons

For a fluorine atom with a -1 charge, how many electrons are present if there are nine protons?

• Eight

• Nine

• Ten

• Eleven

What happens to the number of electrons in a positively charged atom?

• It increases

• It doubles

• It remains the same

• It decreases

In a calcium ion with a +2 charge, how many electrons are present if there are 20 protons?

• 24

• 22

• 20

• 18