16185135
Description
Quiz by IRINA SOSELIA, updated more than 1 year ago
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Created by IRINA SOSELIA
about 6 years ago
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Question 1
Question
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
Answer
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1 kilogram
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500 grams
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practically none
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250 grams
Question 2
Question
You can't live without water! What is its chemical formula?
Answer
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H2
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H2O2
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H2O
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O2
Question 3
Question
Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?
Answer
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Helium
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Krypton
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Chlorine
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Argon
Question 4
Question
What do you call an atom that has more protons than electrons?
Answer
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a molecule
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a cation
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an anion
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an isotope
Question 5
Question
Who is credited with the invention of the modern periodic table?
Answer
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Nobel
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Mendeleev
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Mendel
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Lavoisier
Question 6
Answer
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Sulfur
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Beryllium
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Manganese
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Aluminum
Question 7
Question
Three of the most common states of matter are solids, liquids, and gases. A liquid has:
Answer
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no defined volume or shape
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a defined volume, but not a defined shape
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a definite shape, but no defined volume
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a definite volume and shape
Question 8
Question
. All of the following elements are liquids around room temperature except which one?
Answer
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Gallium
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Mercury
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Bromine
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Magnesium
Question 9
Question
A mole contains Avogadro's number of items. What is Avogadro's number?
Answer
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6023
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83 x 10^
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6.02 x 10^-23
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6.023 x 10^23
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