Does this model represent a compound? Explain your answer.
answer
The model does not represent a compound because it shows two atoms of the same element combined. To be a compound, the model would need to contain atoms of different elements, represented by different-colored balls.
question
H is a chemical
and H2 is a chemical
answer
symbol
formula
question
Complete the sentence with the word "element" or "compound."
answer
element
compound
question
What elements make up this compound? Check all that apply.
answer
carbon
hydrogen
oxygen
question
How many of each atom is present in this compound?
answer
the numbers easy
question
Which of these is a ball and stick model?
answer
C
question
Which chemical formula is represented by the model?
answer
CH4
question
Which subscripts complete the chemical formula for the compound?
answer
how many Cs and Hs
question
Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after the heating. Is the sample of red crystals an element or a compound? Explain your answer.
answer
Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.
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