Self Test

Test your knowledge in atoms and molecules

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QUESTION OF
Views #: 638
Questions #: 12
Time: 20 minutes
Pass Score: 80.0%
Style
Mode

Identify the substances below as element or compound

1 pts

To complete the line match

  1. Click on an item in the first group
  2. Click on the match in the second group

To delete a match, double click on a line

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?

1 pts
Missing
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Explanation

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

1 pts

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?

1 pts
volume_mute
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Use the periodic table to find the elements

1 pts

  • with atomic number 27 (1)
  • with atomic mass 238 (2)
Please drag and drop the selected option in the right place or type it instead
Co (cobalt)
O (Oxygen)
U (uranium)
H (Hydrogen)
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Explain, on the basis of electron orbit, why gases such as helium do not enter into chemical reactions

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

1 pts
volume_mute
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What is meant by the atomic mass of an element?

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

1 pts

atomic number = (1)

atomic mass = (2)

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

1 pts
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What mass of gold (Au) is required to

1 pts

have 1025 gold atoms?

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Classify atom particles

1 pts

drag and drop the selected option to the right place

Positive
Neutral
Negative
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Keywords
Year 10