Elements and Compounds

All of the materials and substances that we experience are made up of elements

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QUESTION OF
Views #: 584
Questions #: 7
Time: 5 minutes
Pass Score: 80.0%
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All of the materials and substances that we experience are made up of 100 of so __________

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Explanation

Choose the right elements

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Most substances we deal with daily are

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A __________ is a chemical combinations of two or more elements

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A compound is

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Identify the elements of each compound

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  1. Water is composed of (1) and (2)
  2. Carbon dioxide is composed of (3) and (4)
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oxygen
nitrogen
hydrogen
carbon
helium
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Identify each of these as an element or a compound

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  1. (1) water
  2. (2) alcohol
  3. (3) carbon
  4. (4) hydrogen
  5. (5) aluminum

(c) compound (e) element

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c
e
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Explanation

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0
sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC
Keywords
Year 9