Electrons and Atomic Structure Concepts

The video tutorial explains how to use the periodic table to determine the number of protons and electrons in an atom. It highlights the importance of the atomic number, which indicates the number of protons and, consequently, the number of electrons due to charge balance. The tutorial provides examples of elements like hydrogen, helium, and others, showing how each proton attracts one electron. It also mentions that while the atomic number reveals protons and electrons, it does not predict the number of neutrons.

What does the atomic number of an element represent?

• The atomic mass

• The number of protons

• The number of neutrons

• The number of electrons

How do protons and electrons balance each other in an atom?

• Protons have a negative charge and electrons have a positive charge

• Protons and electrons both have a negative charge

• Protons have a positive charge and electrons have a negative charge

• Protons and electrons both have a positive charge

What is the charge of a proton?

• 1 minus

• 2 plus

• 1 plus

• Neutral

How many electrons will a hydrogen atom attract?

• No electrons

• Three electrons

• One electron

• Two electrons

If an element has an atomic number of 5, how many electrons does it have?

• 7 electrons

• 5 electrons

• 3 electrons

• 10 electrons

What does each proton in an atom attract?

• Two electrons

• One neutron

• One electron

• Two neutrons

What additional component do atoms have that cannot be predicted by the atomic number?

• Protons

• Neutrons

• Electrons

• Ions

What does the atomic number tell us about electrons?

• It tells us the number of ions

• It tells us the number of electrons

• It tells us the atomic mass

• It tells us the number of neutrons

Why can't the number of neutrons be predicted from the atomic number?

• Because neutrons are always equal to protons

• Because the atomic number only indicates protons and electrons

• Because neutrons are not part of the atomic structure

• Because neutrons have a charge

What is the role of electrons in an atom?

• To decrease the atomic number

• To increase the atomic number

• To determine the atomic mass

• To balance the charge of protons