Chem: Isotopes

An atom is electrically neutral when the number of ...

• protons and neutrons are the same

• protons and electrons are the same

• neutrons and electrons are the same

• neutrons balance the protons and electrons

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

How many neutrons does an atom of the isotope Neon-22 have?

• 12
• 10
• 22
• 20

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

What do these isotopes of carbon all have in common?

• neutrons

• mass number

• atomic number

• atomic mass

Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.

• neutrons ; atomic #’s

• protons ; atomic #’s

• electrons ; atomic masses

• neutrons ; mass #'s

Choose the correct PROTON number for a nitrogen atom with a mass number of 13 and a -2 charge9

• 0

• 5

• 6

• 7

• 13

Choose the correct NEUTRON number for a nitrogen atom with a mass number of 13 and a -2 charge.

• 0

• 5

• 6

• 7

• 13

If an atom has 4 protons, 4 neutrons, and 3 electrons, find the ATOMIC NUMBER

• 0

• 1

• 4

• 7

• 8