Periodic Table Trends

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

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The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Which group of the periodic table is composed of inert (least reactive) gases?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Which is a halogen?

• Helium

• Chlorine

• Oxygen

• Neptune

Elements in a ..................have similar chemical properties.  

• period
• group
• row

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Which of the following will have a larger radius than Zinc (Z = 30) ?

• Gallium (Z = 31)

• Aluminum (Z = 31)

• Magnesium (Z = 12)

• Strontium (Z = 38)

As you move down a group, atomic radius increases because -

• you add more neutrons

• you add more protons

• you add more shells (energy levels)

• you add more atomic mass

Francium (Fr, Z = 87) has the lowest ionization energy in Group 1 because -

• it has the smallest # of valence electrons

• it has the greatest atomic mass

• it has the greatest # of protons, so it attracts its electrons the most

• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

Which of the following will have a lower ionization energy than Scandium (Sc)?

• Helium (He, Z = 2)

• Titanium (Ti, Z = 22)

• Calcium (Ca, Z = 20)

• Magnesium (Mg, Z = 12)

Electronegativity is...

• the ability of an atom to attract/ accept electrons
• the ability of an atom to lose electrons
• the energy required to remove an electron from a specific atom
• how easy it is to make friends. 

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