Mark is telling Sally that his water is an element. Sally disagrees. Who is correct? Why?

Sally is correct because water is made up of many diffrent atoms

Mark is correct because water is composed of only water atoms

Sally is correct because water is composed of only water atoms

Mark is correct because water is made up of many different atoms

Why does the chemical compound for salt (NaCl) have 2 capital letters? What do they stand for?

Capital letters represent diffrent elements

Scientist aren't good at grammars

Capital letters are not important and do not represent anything

Capital letters represent diffrent compounds

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Daniel Wilson5141 8 perguntas

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1Mark is telling Sally that his water is an element. Sally disagrees. Who is correct? Why?
1. AMark is correct because water is composed of only water atoms
2. BSally is correct because water is composed of only water atoms
3. CMark is correct because water is made up of many different atoms
4. DSally is correct because water is made up of many diffrent atoms
2Which of the following is NOT a compound?
1. Asalt
2. Bwater
3. Ccarbon
4. Dsunlight
3True or False. Corn is an element.
1. AVerdadeiro
2. BFalso
4True or False. A compound is something made up of one or more elements.
1. AVerdadeiro
2. BFalso
5A/An [blank_start]________[blank_end] is made up of more than one [blank_start]_______[blank_end].
1. Acompound
2. Belement
6Salt is an example of a/an [blank_start]_______[blank_end].
1. Aelement
7[blank_start]____[blank_end] is made of NaCl
1. Aslat
8Why does the chemical compound for salt (NaCl) have 2 capital letters? What do they stand for?
1. ACapital letters represent diffrent elements
2. BScientist aren't good at grammars
3. CCapital letters are not important and do not represent anything
4. DCapital letters represent diffrent compounds