Ionic Charges and Trends in Size

The video tutorial explores trends in the periodic table, focusing on ionic radius and melting point. It explains how atomic size decreases across a period due to increased nuclear charge. The formation of cations results in smaller ions as they lose an energy level, while anions become larger due to electron repulsion. The tutorial provides examples using sodium and chlorine to illustrate these concepts.

What are the two main trends discussed in the video?

• Atomic mass and density

• Ionic radius and melting point

• Electronegativity and ionization energy

• Conductivity and reactivity

What happens to the size of atoms as you move from left to right across the periodic table?

• Atoms remain the same size

• Atoms become smaller

• Atoms become larger

• Atoms become more reactive

How does a sodium atom achieve a noble gas configuration?

• By gaining one electron

• By losing two electrons

• By losing one electron

• By gaining two electrons

What charge does a sodium ion have after losing an electron?

• 2-

• 2+

• 1+

• 1-

What is the effect on the size of a sodium ion compared to its atom?

• The ion is more reactive

• The ion is the same size

• The ion is smaller

• The ion is larger

How does a chlorine atom achieve a noble gas configuration?

• By gaining two electrons

• By losing one electron

• By losing two electrons

• By gaining one electron

What charge does a chlorine ion have after gaining an electron?

• 2+

• 1+

• 1-

• 2-

What is the effect on the size of a chlorine ion compared to its atom?

• The ion is the same size

• The ion is more reactive

• The ion is larger

• The ion is smaller

What is the term used for positively charged ions?

• Protons

• Neutrons

• Cations

• Anions

Which type of ion tends to be larger, cations or anions?

• Cations

• Neither, they are neutral

• Anions

• Both are the same size