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Author Question: The element that is the second most abundant in Earth's crust is a. oxygen. b. iron. c. nitrogen. ... (Read 101 times)

mia

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on: Jul 28, 2018
The element that is the second most abundant in Earth's crust is
 a. oxygen.
  b. iron.
  c. nitrogen.
  d. silicon.

Question 2

What is the formula of the compound formed from the ions of calcium and bromine?
 a. CaBr3
  b. CaBr
  c. CaBr2
  d. Ca2Br3
  e. None of these


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isabelt_18

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Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

c


mia

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Reply 2 on: Jul 28, 2018
:D TYSM

nguyenhoanhat

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Reply 3 on: Yesterday
Excellent

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