From the following list of elements pick the one that best fits each description

Question

From the following list of elements pick the one that best fits each description; use each element only once.
(a) an alkali metal,
(b) an alkaline earth metal,
(c) a noble gas,
(d) a halogen,
(e) a metalloid,
(f) a nonmetal listed in group 1A,
(g) a metal that forms a 3+ ion,
(h) a nonmetal that forms a 2 ion,
(i) an element that resembles aluminum.

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Ar

Br

Al

H

K

Ga

Ge

O

Ca

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

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Ar

Br

Al

H

K

Ga

Ge

O

Ca

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)

Explanation / Answer

a) an alkali metal - K potassium

b) an alkaline earth metal - Ca ,calcium

c) a noble gas - Ar, Argon

d) a halogen - Br, bromine

e) a metalloid - Ge , Germanium

f) a non-metal listed in IA group - H , hydrogen

g) a metal that forms +3 ion , Al, aluminium

h) a non-metal that forms -2 ion - O, oxygen

i) the element that resembles Aluminium - ga, gallium

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