Question

chem a, unit 2 test

1. email *
2. which atom among cl, al, cs, and li has the greatest electronegativity? mark only one oval.

cl
al
cs
li

1. ionization energy is higher for metals than for non - metals of the same period. mark only one oval.

false
true
can not tell
mr. love’s ex - wife doesn’t know

1. which element is a metalloid? mark only one oval.

arsenic
argon
calcium
hydrogen

Explanation:

1. Electronegativity increases across a period and decreases down a group. Chlorine (Cl) is a non - metal in a relatively high position and right - hand side of the periodic table among the given elements, so it has the highest electronegativity.
2. Ionization energy is generally higher for non - metals than for metals in the same period because non - metals have a greater tendency to gain electrons and hold onto their outer - shell electrons more tightly.
3. Arsenic (As) is a well - known metalloid. Argon is a noble gas, calcium is a metal, and hydrogen is a non - metal.

Answer:

1. A. Cl
2. A. False
3. A. Arsenic