Atoms, Elements, Molecules, And Compounds 1: Question Preview (ID: 2327)


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What is an atom?
a) smallest particle of an element b) a particle about the size of a cell c) particle made up of neutrons and electrons d) smallest particle of a proton
What is a compound?
a) particles made of 2 or more atoms b) a pure substance that cannot be broken down by chemical or physical processes c) particles made of 2 or more different kinds of atoms d) smallest part of an element
Which of the following cannot be a compound?
a) glucose sugar b) water c) carbon dioxide d) hydrogen
What does the number placed in front of the chemical formula for a molecule stand for?
a) number of atoms of an element b) number of molecules c) total number of atoms in the molecule d) none of the above
What do the subscript numbers in a molecule stand for?
a) number of atoms of the element to its right b) number of molecules c) total number of atoms in the molecule d) number of atoms of the element to its left
How many atoms of carbon, hydrogen, and oxygen make up glucose sugar?
a) 3, 6, 3 respectively b) 6, 12, 6 respectively c) 12, 24, 12 respectively d) 2, 1. 2 respectively
Which one of the statements below is true?
a) all molecules are compounds b) very few molecules are compounds c) all compounds are molecules d) molecules and compounds are not related
What is a molecule?
a) particles made of 2 or more atoms b) particles made of 2 or more different kinds of atoms c) a pure substance that cannot be broken down by chemical and physical processes d) the smallest particle of an element
Which element do water, carbon dioxide, and glucose sugar all have in common?
a) nitrogen b) oxygen c) hydrogen d) carbon
How many different kinds of atoms make up glucose sugar?
a) 24 b) 2 c) 6 d) 3
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