Semester Review

H₂O, CH_4, NaCl are all examples of chemical

• formulas
• properties
• changes
• bonds

Tags

NGSS.MS-PS1-1

How many protons does an atom of Carbon have?

• 6
• 4
• 12
• 14

Tags

NGSS.MS-PS1-1

In the formula, MgCl₂, what does the 2 tell you?

• Chlorine has 2 valence electrons
• Chlorine has a 2+ charge
• Chlorine has a 2- charge
• There are 2 Chlorine atoms

Tags

NGSS.MS-PS1-1

What does a neutralization reaction produce?

• an acid
• a base
• salt and water
• sugar and water

The first aid measures section of the MSDS provides information like:

• what to do in case of exposure to skin, eyes, or inhalation

• how to prevent exposure

• what to do if the substance catches on fire

• what to do if the substance is spilled

• how to store the substance

Which subatomic particle is counted to determine the type of element the atom represents?

• proton

• neutron

• electron

• boron

Tags

NGSS.MS-PS1-1

HBr has a difference in electronegativity of 0.7. Based on the table, what kind of bond is HF?

• Nonpolar covalent

• Polar covalent

• Ionic

Atomic number 11 is

• Ar

• K

• Na

• Ti

What is the charge on a lithium atom that looses 1 electron?

• +1
• 0
• -1
• -2

Tags

NGSS.MS-PS1-1

What is the volume of the water in this graduated cylinder?

• 21 mL
• 23.5 mL
• 22 mL
• 21.5 mL