Question

1. which of the following elements has the highest ionization energy?

a) lithium (li)
b) fluorine (f)
c) potassium (k)
d) barium (ba)

1. ionization energy is best defined as:

a) the energy released when an atom gains an electron
b) the energy required to remove an electron from a neutral atom
c) the energy required to break a chemical bond
d) the energy absorbed when an atom undergoes fusion

1. which group of elements has low electronegativity and tends to lose electrons easily?

a) halogens
b) alkali metals
c) noble gases
d) transition metals

Explanation:

• For question 3, ionization energy generally increases across a period and decreases down a group. Fluorine is in the upper - right of the periodic table among these options, so it has the highest ionization energy.
• For question 4, ionization energy is the energy required to remove an electron from a neutral atom in the gaseous state.
• For question 5, alkali metals have low electronegativity and readily lose their outermost electron to achieve a stable electron configuration.

Answer:

1. B. Fluorine (F)
2. B. The energy required to remove an electron from a neutral atom
3. B. Alkali metals