Explanation:

Aluminum

USED:

A light metal used in making airplanes, buildings, pots & pans, etc.

Bromine

Used:

in photography, medicines, insecticides, etc

Calcium

USED

A soft, metallic chemical element found in limestone, marble, chalk, etc

Carbon

USED:

Found in coal, oil gas, living things, & inks

oxygen

USED:

include production of steel, plastics and textiles, brazing, welding and cutting of steels and other metals, rocket propellant, oxygen therapy, and life support systems in aircraft, submarines, spaceflight and diving

Answer:

1. Aluminum - A light metal used in making airplanes, buildings, pots & pans, etc.
2. Bromine - Used in photography, medicines, insecticides, etc.
3. Calcium - A soft, metallic chemical element found in limestone, marble, chalk, etc.
4. Carbon - Found in coal, oil gas, living things, & inks

Explanation:

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