Properties of Metals and Nonmetals

The video tutorial explains the properties of metallic and nonmetallic elements, focusing on their tendencies to lose or gain electrons. It discusses how these properties vary across periods and down groups in the periodic table. Metallic character decreases and nonmetallic character increases across a period due to decreasing atomic size and stronger nuclear attraction. Conversely, metallic character increases and nonmetallic character decreases down a group due to increasing atomic size and weaker nuclear attraction. Examples like sodium, chlorine, carbon, and tin illustrate these trends.

What is the nature of metals in terms of electron behavior?

• Neutral

• Inert

• Electronegative

• Electropositive

Which element easily forms a positively charged ion by losing one electron?

• Sodium

• Chlorine

• Fluorine

• Carbon

What is the nature of nonmetals in terms of electron behavior?

• Inert

• Neutral

• Electronegative

• Electropositive

Which element easily forms a negatively charged ion by accepting one electron?

• Sodium

• Carbon

• Fluorine

• Chlorine

How does metallic character change from left to right in a period?

• Remains the same

• First increases then decreases

• Decreases

• Increases

Which element in the third period and first group is a metal?

• Carbon

• Sodium

• Chlorine

• Fluorine

How does metallic character change from top to bottom in a group?

• First decreases then increases

• Remains the same

• Decreases

• Increases

Which element in the 14th group and second period is a nonmetal?

• Carbon

• Sodium

• Chlorine

• Fluorine

What happens to atomic size as the atomic number increases in a period?

• Increases

• Decreases

• First increases then decreases

• Remains the same

How does nonmetallic character change from top to bottom in a group?

• Increases

• Decreases

• Remains the same

• First increases then decreases