Unit 6 Assessment

How many protons does He have?

• 4
• 2
• 6
• 0

The top number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

The bottom number in this isotope notation is

• the mass number
• the atomic number
• the atomic mass
• the neutron number

^{The photo above shows the isotopic notation for which isotope?}

• Carbon 12
• Carbon 13
• Carbon 14
• Carbon 15

Different isotopes have...

• different masses
• different atomic numbers
• different electrons
• different protons

What is the atomic mass of the pictured isotope?

• 2

• 4

• 6

• The correct answer isn't one of the choices.

Which of the following is the proper equation for determining the number of neutrons for a given isotope?

• mass # - atomic #
• atomic mass - protons
• protons + electrons
• mass # + protons

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

• 29
• 34
• 63
• 92

Isotopes occur when atoms of the same element have a different number of ___________.

• protons
• neutrons
• electrons
• nucleons

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70