A pale yellow element occurring widely in nature is: a. iron c. sulfur b. phosphorus d. ...

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Author Question: A pale yellow element occurring widely in nature is: a. iron c. sulfur b. phosphorus d. ... (Read 87 times)

jessicacav

Hero Member
Posts: 558

on: Jul 21, 2018

A pale yellow element occurring widely in nature is:

a. iron c. sulfur
b. phosphorus d. antimony

Question 2

For human survival, approximately what percentage of the air must be oxygen?

a. 21 c. 54
b. 77 d. 42

cam1229

Sr. Member
Posts: 329

Reply #1 on: Jul 21, 2018

Answer to Question 1

C

Answer to Question 2

A

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