What is a key characteristic of compounds in terms of atomic composition?
Formulae

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Science, Physics, Chemistry
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6th - 12th Grade
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
They consist of atoms in a random ratio.
They consist of atoms in a fixed ratio.
They consist of atoms in a variable ratio.
They consist of atoms in a changing ratio.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is the correct chemical formula for sodium chloride?
Na2Cl2
Na2Cl
NaCl2
NaCl
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the compound NaCl, how many sodium atoms are there for each chlorine atom?
One sodium atom
Three sodium atoms
Four sodium atoms
Two sodium atoms
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the chemical formula for water?
H2O
OH2
HO2
H2O2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many hydrogen atoms are present in a single water molecule?
Three hydrogen atoms
Two hydrogen atoms
One hydrogen atom
Four hydrogen atoms
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