Exploring Atomic Radii Trends in the Periodic Table

The video tutorial explores the concept of atomic radii trends in the periodic table. It begins by discussing the significance of the periodic table in understanding element relationships. The tutorial then delves into vertical trends, explaining how atomic radii increase down a group due to added electron shells and shielding. It contrasts this with horizontal trends, where atomic radii decrease across a period as increased protons pull electrons closer. The video confirms these trends with data, illustrating the changes in atomic radii across different periods and groups.

What is one of the key insights provided by the periodic table?

• The taste of elements

• The weight of elements

• The atomic radius trends

• The color of elements

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

As you move down Group 1 in the periodic table, what happens to the atomic radius?

• It fluctuates

• It increases

• It remains the same

• It decreases

Why does the atomic radius increase as you move down Group 1?

• Because the number of neutrons decreases

• Because the number of protons decreases

• Because the outermost electron is at a higher energy level

• Because the nucleus becomes smaller

Tags

NGSS.HS-PS1-1

What happens to the atomic radius as you move from left to right across a period?

• It increases

• It remains the same

• It decreases

• It fluctuates

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why does the atomic radius decrease as you move across a period?

• Because the number of neutrons increases

• Because protons are added, increasing the positive charge

• Because electrons are added to higher energy levels

• Because the outermost electrons move further away

Tags

NGSS.HS-PS1-1

What does the plot of atomic number versus atomic radius confirm?

• That atomic radius increases across a period

• That atomic radius decreases down a group

• That atomic radius decreases across a period

• That atomic radius remains constant

Which element has the largest atomic radius in Period 2?

• Carbon

• Helium

• Lithium

• Beryllium

Tags

NGSS.HS-PS1-1

What trend is observed in Group 1 elements from hydrogen to cesium?

• Atomic radius fluctuates

• Atomic radius increases

• Atomic radius remains the same

• Atomic radius decreases

Which group in the periodic table shows a similar trend to Group 1 in terms of atomic radius?

• Group 4

• Group 5

• Group 3

• Group 2

What is the general trend of atomic radius as you move down any group in the periodic table?

• It fluctuates

• It increases

• It remains the same

• It decreases