Electron Configuration and Periodic Trends

What is a positively-charged ion which forms when an atom loses electrons?

• atom

• ion

• cation

• anion

What is the amount of energy required to remove an electron from an atom?

• atomic energy

• ionization energy

• ionic energy

• electron energy

What is a negatively-charged ion which forms when an atom gains electrons?

• cation

• anion

• electron

• ion

What is a vertical (up and down) column in the periodic table?

• group or family

• period

• periodic law

• octet rule

What is a horizontal (left and right) row of elements in the periodic table?

• group or family

• period

• periodic law

• octet rule

Which electrons are in the outermost energy level of an atom?

• inner electrons

• electron cloud

• core electrons

• valence electrons

What is the trend on the periodic table for ionization energy (the energy required to remove an electron from a gaseous atom or ion)?

• increases top to bottom; increases left to right

• decreases top to bottom; decreases left to right

• decreases top to bottom; increases left to right

• increases top to bottom; decreases left to right

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

What is the trend on the periodic table for electronegativity (the ability of an atom to attract electrons when the atom is in a compound)?

• decreases top to bottom; increases left to right

• decreases top to bottom; decreases left to right

• increases top to bottom; increases left to right

• increases top to bottom; decreases left to right

Which of these sequences do not show the correct trend in ionization energy?

• Al<Si< P<Cl
• Be<Mg<Ca<Sr
• I<Br<Cl<F
• Na<Mg<Al<Si