Science Review

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.MS-PS1-1

Which of the following is a compound?

• Co
• O₂
• C
• CO₂

Tags

NGSS.MS-PS1-1

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄
• HSO₄
• H₄S₃O
• H₂O

Tags

NGSS.MS-PS1-1

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

How many atoms of oxygen are represented in the chemical formula:

Ca(OH)₂

• 1

• 2

• 4

• 5

Tags

NGSS.MS-PS1-1

Which of the following is a positively charged subatomic particle found in the nucleus of an atom?

• Electron
• Proton
• Neutron
• Quark

Tags

NGSS.HS-PS1-8

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15

• 31

• 16

• 47

Tags

NGSS.MS-PS1-1

Calcium (Ca) is most like which of the following? (Hint: Similar Properties = Casitas)

• Barium (Ba)

• Potassium (K)

• Cesium (Ce)

• Nitrogen (N)

Elements which are considered semiconductors are 

• metal
• nonmetal
• metalloid
• nonexistent

How many valence electrons does iodine (I) have?

• 6

• 16

• 7

• 17