Chemistry Final Exam

Which of the metals is very reactive in water? (a)  

• Fr
• Al
• Cl
• C

Which metal is not very reactive with water.

• Rn

• Mg

• K

• Pt

According to the graph, which element has the biggest atomic radius?

• Krypton

• Lithium

• Cesium

• Hydrogen

Which atom has a larger atomic radius?

• Francium

• Silver

• Calcium

• Potassium

Which of the following elements has the smallest radius?

• Mg
• Al
• Si
• K

Which element in Period 2 has the greatest atomic radius?

• Be

• C

• Na

• Li

Of the halogens (group 7A), which has the smallest radius?

• F

• Br

• He

• At

As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 

• the number of protons increases, so attraction to electrons increases
• the number of energy levels increases
• the number of electrons increases
• the atomic mass increases

Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

• decreases, increases

• increases, increases

• increases, decreases

• stays the same, increases