How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

which explanation of this notation is correct?

•  12 is proton #
• 6 tells you there are 6 neutrons
• 6 tells you there are 6 protons
• 12 is not a mass # here

Tags

NGSS.MS-PS1-1

Isotopes have different numbers of

• protons
• neutrons
• electron
• properties

The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.

• 9
• 10
• 19
• 28

How many neutrons does a Sodium 24 isotope have?

• 12
• 13
• 14
• 15

Which one of these is a chemical property?

• melting point
• boiling point
• color
• flammability

Which of the following is not a chemical property? 

• rusting 
• boiling 
• rotting 
• burning 

Which of the following is a chemical property of water?

• Reacts with pure sodium
• Boils at 100 ^oC
• Is liquid at room temperature
• Has a density of 1 gm/mL

Which of these is a result of a chemical change?

• A mixture
• A solution
• A new substance
• Melting or freezing

Tags

NGSS.MS-PS1-2

Lighter gases have a ________________ rate of effusion.

• faster 
• slower
• rate of effusion does not depend on mass.