16185135
Descrição
Quiz por IRINA SOSELIA, atualizado more than 1 year ago
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Criado por IRINA SOSELIA
aproximadamente 6 anos atrás
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Questão 1
Questão
One of the essential minerals in the human body is salt. How much salt (NaCl) is in the average adult human body?
Responda
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1 kilogram
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500 grams
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practically none
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250 grams
Questão 2
Questão
You can't live without water! What is its chemical formula?
Responda
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H2
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H2O2
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H2O
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O2
Questão 3
Questão
Noble gases are inert because they have completed outer electron shells. Which of these elements isn't a noble gas?
Responda
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Helium
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Krypton
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Chlorine
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Argon
Questão 4
Questão
What do you call an atom that has more protons than electrons?
Responda
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a molecule
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a cation
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an anion
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an isotope
Questão 5
Questão
Who is credited with the invention of the modern periodic table?
Responda
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Nobel
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Mendeleev
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Mendel
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Lavoisier
Questão 6
Responda
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Sulfur
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Beryllium
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Manganese
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Aluminum
Questão 7
Questão
Three of the most common states of matter are solids, liquids, and gases. A liquid has:
Responda
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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
Questão 8
Questão
. All of the following elements are liquids around room temperature except which one?
Responda
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Gallium
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Mercury
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Bromine
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Magnesium
Questão 9
Questão
A mole contains Avogadro's number of items. What is Avogadro's number?
Responda
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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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