Atomic Number and Nuclear Charge Concepts

The video tutorial explains how the atomic number increases across periods in the periodic table, leading to an increase in the number of protons and electrons. This results in a higher nuclear charge, which causes a stronger pull on the electrons, making them less easily used or removed.

What happens to the atomic number as we move across periods in the periodic table?

• It fluctuates

• It increases

• It remains the same

• It decreases

What does an increase in atomic number indicate?

• Decrease in protons

• Increase in protons and electrons

• Decrease in electrons

• No change in protons and electrons

What increases along with the atomic number?

• Only protons

• Only electrons

• Both protons and electrons

• Neither protons nor electrons

What is the effect of an increased nuclear charge on electrons?

• Electrons are more easily removed

• Electrons remain unaffected

• Electrons are more strongly pulled

• Electrons are less strongly pulled

Why do electrons become harder to remove with an increased nuclear charge?

• Because they are pulled more strongly by the nucleus

• Because they gain more energy

• Because they move to higher energy levels

• Because they lose energy