Chemistry Midterm JS

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

What is the atomic mass of "F"

• 9
• 18
• 17
• 19

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

electrons have this type of charge?

• negative
• positive
• neutral

What is the correct definition for isotopes?

• atoms with the same number of protons and neutrons

• Atoms with the same number of protons but different number of neutrons

• Atoms with the same number of neutrons but different number of protons

• Atoms with no mass

• The atomic number indicates the number of neutrons

• The atomic number indicates the isotope number

• The atomic number indicates the number of protons

• The atomic number indicates the number of protons and neutrons

The bottom number in this isotope notation represent

• the mass number

• the proton number

• the element symbol

• the neutron number

According to the isotopic notation for copper-63, how many neutrons are present in copper-63 atom?

• 29

• 34

• 63

• 92