Elements and Molecules
Authored by Charles Martinez
Chemistry
7th - 8th Grade
NGSS covered
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The element oxygen, represented by the symbol O, is classified as
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
What is a compound?
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?
Tags
NGSS.MS-PS1-1
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a material contains three elements joined in a fixed proportion, it is a(n)
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
According to the chemical formula for sugar, how many Hydrogen (H) atoms are there?
C12H22O11
Tags
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
According to the chemical formula for salt, what is the ratio of sodium (Na) atoms to chlorine (Cl) atoms?
NaCl
Tags
NGSS.MS-PS1-1
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