Chemical Changes and Counting Atoms

Which of the following is an example of an element?

• Cl

• H₂O

• 2Cl₂

• HI

Tags

NGSS.MS-PS1-1

Which is an example of a compound?

• Cl₂

• H₂

• He

• HCl

Which correctly lists the elements in the compound cholesterol (C₂₇H₄₆O) ?

• calcium, hydrogen, oxygen

• carbon, hydrogen, oxygen

• chromium, helium, oxygen

• earth, wind, fire

Tags

NGSS.MS-PS1-1

Which correctly identifies the elements in NaCl ?

• sodium, carbon, iodine

• sulfur, chlorine

• nitrogen, carbon, iodine

• sodium, chlorine

Tags

NGSS.MS-PS1-1

How many atoms of Hydrogen are found in Butane (C₄H₁₀) ?

• 2

• 6

• 14

• 10

Tags

NGSS.MS-PS1-1

How many atoms of chlorine are found in Epibatidine (C₁₁H₃₁CIB₂) (frog poison) ?

• 4

• 2

• 5

• 1

Tags

NGSS.MS-PS1-1

How many total atoms are found in Butane (C₄H₁₀) ?

• 4

• 10

• 14

• 6

Tags

NGSS.MS-PS1-1

How many total atoms are found in ibuprofen (C₁₃H₁₈O₂) ?

• 3

• 33

• 13

• 31

Tags

NGSS.MS-PS1-1

How many molecules in 6H₂O?

• 2

• 18

• 6

• none

Tags

NGSS.MS-PS1-1

How many atoms of Hydrogen are found in 6H₂O ?

• 6

• 12

• 18

• 2

Tags

NGSS.MS-PS1-1