Self Test

Test your knowledge in atoms and molecules
picture_as_pdf Worksheet

QUESTION OF
calculate
Questions #: 12
Time: 20 minutes
Pass Score: 80.0%
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Mode

Identify the substances below as element or compound

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  2. Click on the match in the second group

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Substance

berkelium
MgO
Hf
ammonia
tin

Category

Element
Compound
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Explanation

What do we call the smallest unit an element can be broken into and still the same properties?

Missing
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Explanation

What do we call the smallest unit of a compound that retains the properties of the compound?

Have fun and play hangman game to guess the word

Use the alphabet below to guess the word, then enter it in the input field

You have lives

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Explanation

What does the atomic number tell us about an atom?

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Explanation

Use the periodic table to find the elements

  • with atomic number 27 (1) transparent
  • with atomic mass 238 (2) transparent
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Co (cobalt)
O (Oxygen)
U (uranium)
H (Hydrogen)
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Explanation

Explain, on the basis of electron orbit, why gases such as helium do not enter into chemical reactions

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Explanation

The magnesium atom has two electrons in its outer orbit. Name two other elements whose atoms have this characteristic

Be (beryllium)
H (Hydrogen)
Ca (calcium)
O (Oxygen)
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Explanation

What is meant by the atomic mass of an element?

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Explanation

Use the periodic table to find the atomic number and atomic mass of sodium (Na).

atomic number =

atomic mass =

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Explanation

How many molecules are contained in 2.8 grams of carbon monoxide (CO)?

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Explanation

What mass of gold (Au) is required to

have 1025 gold atoms?

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Explanation

Classify atom particles

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Positive
Neutral
Negative
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Explanation

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Trials
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Avg score
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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

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