Atomic size trend

Which of the following elements is expected to have the largest atomic radius?

• Ca

• Rb

• K

• I

Which of the following is generally true about atomic size?

• Remains constant within a period

• Decreases from left to right across a period

• Decreases from top to bottom within a group

• Increases from left to right across a period

As you move down a group in the periodic table, atomic size generally __________.

• increases

• decreases

• varies randomly

• remains the same

As the number of electrons added to the same principal energy level increases, atomic size generally ___________.

• increases

• decreases

• varies randomly

• remains the same

Which of the following elements has the smallest atom

• Na

• Mg

• Si

• Cl

Which of the following correctly lists the elements Ca, Mg and Be in increasing order of their atomic radii?

• Be < Ca < Mg

• Mg < Be < Ca

• Be < Mg < Ca

• Ca < Mg < Be